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Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks
Step One Men's Bamboo Trunks

Step One Men's Bamboo Trunks

(4,402 reviews)

Are you tired of constantly adjusting your underwear throughout the day? Introducing our ultra-comfortable men's Trunks, great for guys with thinner legs. Our First Pair Guarantee ensures that you'll love them or they're FREE. The 3D Comfort Pouch features a hidden elastic band that surrounds you perfectly, providing all-day support and comfort. Our UltraGlyde ride-up resistant panels ensure that your underwear stays in place, no matter what activities you're engaging in. Made from a super soft bamboo viscose blend, these underwear not only feel amazing on your skin, but they're also environmentally friendly. The bamboo viscose material wicks away moisture, keeping you feeling fresh and dry all day long. Plus, our bamboo viscose is produced in a closed-loop system, making it a sustainable choice. With 95% viscose made from bamboo and 5% spandex, these underwear offer the perfect balance of stretch and support. Mix and match sizes, colours, and styles to create your perfect multi-pack. Don't miss out on the ultimate comfort and support of our men's bamboo viscose underwear.

Are you tired of constantly adjusting your underwear throughout the day? Introducing our ultra-comfortable men's Trunks, great for guys with thinner legs. Our First Pair Guarantee ensures that you'll love them or they're FREE. The 3D Comfort Pouch features a hidden elastic band that surrounds you perfectly, providing all-day support and comfort. Our UltraGlyde ride-up resistant panels ensure that your underwear stays in place, no matter what activities you're engaging in. Made from a super soft bamboo viscose blend, these underwear not only feel amazing on your skin, but they're also environmentally friendly. The bamboo viscose material wicks away moisture, keeping you feeling fresh and dry all day long. Plus, our bamboo viscose is produced in a closed-loop system, making it a sustainable choice. With 95% viscose made from bamboo and 5% spandex, these underwear offer the perfect balance of stretch and support. Mix and match sizes, colours, and styles to create your perfect multi-pack. Don't miss out on the ultimate comfort and support of our men's bamboo viscose underwear.

$29.00 - $33.00

in 2 offers

The lowest price for Step One Men's Bamboo Trunks right now is $29.00 at Amazon.com.au, compared across 2 retailers.

The all-time low was $17.40 on 9 Oct 2025 — today's price is 67% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 15 June 2026.

Size:

Step One Men's Bamboo Trunks

$29.00

(4,402 reviews)

Are you tired of constantly adjusting your underwear throughout the day? Introducing our ultra-comfortable men's Trunks, great for guys with thinner legs. Our First Pair Guarantee ensures that you'll love them or they're FREE. The 3D Comfort Pouch features a hidden elastic band that surrounds you perfectly, providing all-day support and comfort. Our UltraGlyde ride-up resistant panels ensure that your underwear stays in place, no matter what activities you're engaging in. Made from a super soft bamboo viscose blend, these underwear not only feel amazing on your skin, but they're also environmentally friendly. The bamboo viscose material wicks away moisture, keeping you feeling fresh and dry all day long. Plus, our bamboo viscose is produced in a closed-loop system, making it a sustainable choice. With 95% viscose made from bamboo and 5% spandex, these underwear offer the perfect balance of stretch and support. Mix and match sizes, colours, and styles to create your perfect multi-pack. Don't miss out on the ultimate comfort and support of our men's bamboo viscose underwear.

Are you tired of constantly adjusting your underwear throughout the day? Introducing our ultra-comfortable men's Trunks, great for guys with thinner legs. Our First Pair Guarantee ensures that you'll love them or they're FREE. The 3D Comfort Pouch features a hidden elastic band that surrounds you perfectly, providing all-day support and comfort. Our UltraGlyde ride-up resistant panels ensure that your underwear stays in place, no matter what activities you're engaging in. Made from a super soft bamboo viscose blend, these underwear not only feel amazing on your skin, but they're also environmentally friendly. The bamboo viscose material wicks away moisture, keeping you feeling fresh and dry all day long. Plus, our bamboo viscose is produced in a closed-loop system, making it a sustainable choice. With 95% viscose made from bamboo and 5% spandex, these underwear offer the perfect balance of stretch and support. Mix and match sizes, colours, and styles to create your perfect multi-pack. Don't miss out on the ultimate comfort and support of our men's bamboo viscose underwear.

XXS
XS
M
L
XL
XXL
2XL

Price comparison

Price data powered by pricesAPI.io

Last updated at 15/06/2026 06:35:30

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Amazon.com.au

$29.00

STEP ONE Mens Underwear Trunk Briefs, 1 Pair, Underwear for Men, Moisture Wicking, 3D Pouch + No Ride Up Trunk Briefs for Men

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Step One

$33.00

Men's Trunk | Black Currants | Bamboo Underwear for Men | Men's Undies | No Chafing | Breathable

Free delivery between 17–29 June

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

31 January 2024Lawrence

originally posted on step-one-uk.myshopify.com

I have been wearing these boxes for a little while now, obviously clean each day!I have to say they are absolutely brilliant, I can't praise them enough. They are so comfortable and you don't even know you have them on half the time.I would hundred percent recommend you give them a try I think you'll be pleasantly surprised. My only observation is maybe a little pricey, but I guess you get what you pay for time will tell how well they were long-term! But I'm sure there will be feedback in the future about how long they last, and under strenuous exercise etc.Plus, they look quite flashy, smart and well put together.

29 November 2023Sandy P.

originally posted on step-one-uk.myshopify.com

The inside leg panel goes loose n changes shape and wrinkles rather quickly for the price I think they should last longer. Still over all the best make off boxer briefs I’ve ever worn all i wear now is stepone I’ve went from an XL to a L and don’t like the thickness off the waste band on the L, it’s to thick for me and rolls over under belly. If it wasn’t for the 15 pairs for £104.61 deal a few times a year wouldn’t have a pair off these as they’re pricey. They’ve changed my life as you can see from my orders I’m a regular customer as soon as there’s a deal I always grab them. I thank you for having these clearance sales as I would’ve never had the chance to try them and become a loyal customer. I’ve even got family and friends buying them now.

Almost perfect
2 February 2023

originally posted on stepone.life

Overall, I have purchased around 15 of the Step One trunks in the past 3 years.I still have and wear the ones from 3 years ago.They're probably the most comfortable underwear I've worn around the legs, butt and frontal region.But I have to say that unless you have a washboard stomach, the waste band will be uncomfortable at times.Having the daddy gut that I do, the front part of the waste band rolls up and bunches, making it uncomfortable and giving you the need to adjust it every now and thenThe main reason I haven't switched to another underwear, is that I've found the same issue with all that I've tried.But as I said earlier, everything from the waste band down is perfection.It really does feel like you're not wearing any underwear at all.It also cradles ... MoreOverall, I have purchased around 15 of the Step One trunks in the past 3 years.I still have and wear the ones from 3 years ago.They're probably the most comfortable underwear I've worn around the legs, butt and frontal region.But I have to say that unless you have a washboard stomach, the waste band will be uncomfortable at times.Having the daddy gut that I do, the front part of the waste band rolls up and bunches, making it uncomfortable and giving you the need to adjust it every now and thenThe main reason I haven't switched to another underwear, is that I've found the same issue with all that I've tried.But as I said earlier, everything from the waste band down is perfection.It really does feel like you're not wearing any underwear at all.It also cradles the valuables really well too.

Price comparison

Updated 3 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
Amazon.com.au

$29.00

STEP ONE Mens Underwear Trunk Briefs, 1 Pair, Underwear for Men, Moisture Wicking, 3D Pouch + No Ride Up Trunk Briefs for Men

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Step One

$33.00

Men's Trunk | Black Currants | Bamboo Underwear for Men | Men's Undies | No Chafing | Breathable

Free delivery between 17–29 June

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

31 January 2024

I have been wearing these boxes for a little while now, obviously clean each day!I have to say they are absolutely brilliant, I can't praise them enough. They are so comfortable and you don't even know you have them on half the time.I would hundred percent recommend you give them a try I think you'll be pleasantly surprised. My only observation is maybe a little pricey, but I guess you get what you pay for time will tell how well they were long-term! But I'm sure there will be feedback in the future about how long they last, and under strenuous exercise etc.Plus, they look quite flashy, smart and well put together.

Lawrence originally posted on step-one-uk.myshopify.com
29 November 2023

The inside leg panel goes loose n changes shape and wrinkles rather quickly for the price I think they should last longer. Still over all the best make off boxer briefs I’ve ever worn all i wear now is stepone I’ve went from an XL to a L and don’t like the thickness off the waste band on the L, it’s to thick for me and rolls over under belly. If it wasn’t for the 15 pairs for £104.61 deal a few times a year wouldn’t have a pair off these as they’re pricey. They’ve changed my life as you can see from my orders I’m a regular customer as soon as there’s a deal I always grab them. I thank you for having these clearance sales as I would’ve never had the chance to try them and become a loyal customer. I’ve even got family and friends buying them now.

Sandy P. originally posted on step-one-uk.myshopify.com
Almost perfect
2 February 2023

Overall, I have purchased around 15 of the Step One trunks in the past 3 years.I still have and wear the ones from 3 years ago.They're probably the most comfortable underwear I've worn around the legs, butt and frontal region.But I have to say that unless you have a washboard stomach, the waste band will be uncomfortable at times.Having the daddy gut that I do, the front part of the waste band rolls up and bunches, making it uncomfortable and giving you the need to adjust it every now and thenThe main reason I haven't switched to another underwear, is that I've found the same issue with all that I've tried.But as I said earlier, everything from the waste band down is perfection.It really does feel like you're not wearing any underwear at all.It also cradles ... MoreOverall, I have purchased around 15 of the Step One trunks in the past 3 years.I still have and wear the ones from 3 years ago.They're probably the most comfortable underwear I've worn around the legs, butt and frontal region.But I have to say that unless you have a washboard stomach, the waste band will be uncomfortable at times.Having the daddy gut that I do, the front part of the waste band rolls up and bunches, making it uncomfortable and giving you the need to adjust it every now and thenThe main reason I haven't switched to another underwear, is that I've found the same issue with all that I've tried.But as I said earlier, everything from the waste band down is perfection.It really does feel like you're not wearing any underwear at all.It also cradles the valuables really well too.

originally posted on stepone.life
Cannot Recommend - Expensive & Uncomfortable
18 October 2020

After reading numerous positive reviews of this product, I recently purchased a pair of Step-One trunks in 'Juicy Plums' colour. (Order #515301) I was initially impressed by Step-One's site and their claims about the bamboo material the they were made from.Unfortunately, as I only purchased one pair as a trial, and of course they're now in a worn condition, I can no longer return them and/or get a refund. This is of concern to me, particularly as at $29 these trunks are very expensive compared with the cotton Jockey trunks I usually buy for half that price.I'm also concerned that no mention is made of the Step-One's bamboo production process; are the toxic chemicals sodium hydroxide and carbon disulphide, which have been linked to serious health problems, used in ... MoreAfter reading numerous positive reviews of this product, I recently purchased a pair of Step-One trunks in 'Juicy Plums' colour. (Order #515301) I was initially impressed by Step-One's site and their claims about the bamboo material the they were made from.Unfortunately, as I only purchased one pair as a trial, and of course they're now in a worn condition, I can no longer return them and/or get a refund. This is of concern to me, particularly as at $29 these trunks are very expensive compared with the cotton Jockey trunks I usually buy for half that price.I'm also concerned that no mention is made of the Step-One's bamboo production process; are the toxic chemicals sodium hydroxide and carbon disulphide, which have been linked to serious health problems, used in this product?From a wearer's perspective, I was also disappointed. The waist band tends to roll over at your abdomen (and no, I don't have a beer gut LOL); the fabric has a "slimy" feel, unlike the softness of cotton; it feels as though you're wearing pantyhose (I imagine); the so-called comfort pouch tends to let the family jewels bang around; the fabric itself is very thin; and after repeated sitting/standing movements, the legs gradually sneak up your thighs.I used Step-One's sizing guide, which 'seems' appropriate, and purchased the 2XL size for my 112cm waist. I can only think that their sizing charts are overly generous, as I now believe that the Extra Large would've been a better fit, and possibly negate the leg creep.Overall then, a disappointing and costly buying "experiment\

originally posted on stepone.life
Extremely bad. Misleading marketing
25 January 2023

All buyers be careful as there is no description of the material they use. I was to assume they are cotton rich but it’s purely synthetic. Imagine wearing swimming trunks under your garments all day long. Better shop for Tradie brand at Big W more comfortable and half the price. Also we live in a society where layman’s language is used. Their marketing tactics are based on Latin sayings. They advertise as a pair of undies and all you get is one underwear and their explanation is as per Latin when there are two legs it’s a pair. I know by saying that they are right but be fair with people who don’t know these terms and paying for an underwear that is double the price in market thinking why not give it a try as we are paying the same for two underwear in Big W or ... MoreAll buyers be careful as there is no description of the material they use. I was to assume they are cotton rich but it’s purely synthetic. Imagine wearing swimming trunks under your garments all day long. Better shop for Tradie brand at Big W more comfortable and half the price. Also we live in a society where layman’s language is used. Their marketing tactics are based on Latin sayings. They advertise as a pair of undies and all you get is one underwear and their explanation is as per Latin when there are two legs it’s a pair. I know by saying that they are right but be fair with people who don’t know these terms and paying for an underwear that is double the price in market thinking why not give it a try as we are paying the same for two underwear in Big W or elsewhere. I found it to be very uncomfortable underwear due to synthetic material. Shirt kept slipping out and pants kept slipping down. It’s nothing but a slippery coating on your body. I’ll go back to Tradie’s from Big W.

originally posted on stepone.life
False advertising
14 June 2024

This is ridiculous! I was looking to purchase 4 pairs and get 4 free.According to your website, I would be paying $16.50ea which should make the total $66 for 8 pairs. I added the 4 to my cart and the total kept going up as I added the extra 4 items. It turns out they are $33 a pair, not $16.50. This is false advertising because I can't see anywhere when I click on an item that the price is $33. This is a shame because over the years I have accumulated quite a few pairs, but I can't bring myself to pay for the 8 items in my cart. I feel ripped off!

originally posted on stepone.life
Hesitant but pleasantly surprised.
15 December 2023

Been struggling to convince my self to buy something other than the Australian staple underwear brand. How much better could the alternatives really be. Just underwear right?Well finally decided to finally try some stepone's.They are super comfy over the trunks i use to be wearing. Don't get that uncomfortable feeling when walking in hot weather. They stay where they are supposed to, and i feel soo much dryer and cooler.Still early days, but so far, I would recommend people give them a go.

Bradley K. originally posted on stepone.life
I have almost completely replaced all my underwear with Step One
1 May 2023

I have almost completely replaced all my underwear with Step One trunks. They are extremely comfortable. It's like I'm not wearing anything. These are the first trunks/boxer briefs that I have tried where the legs NEVER ride up. I'm not constantly adjusting to try to pull the legs back down.Recently, I order two more pair. When I got them I washed them, but then I noticed that one of them was the wrong size. I contacted their Customer Service. After a couple of pictures to show what size I actually received, I got a notification that my replacement pair had been shipped. Great Customer Service.

Mike L. originally posted on stepone.life
Realistic expectations
27 January 2020

This is my second review on these. My husband loves them so much they are the only ones he wears now. The one on the left is from new this Christmas the one on the right is over two years old(3 father's days ago) we bought the 15 pairs deal each time after the first pair purchase to check sizing. As you can see the elastic is starting to perish as I expect it would after that many wears. They have slight fading due to wear and drying in the hot Mildura sun but overall no noticeable shrinkage or creased elastic(it helps to shake them after washing before hanging up as the spin cycle in the machine does crease the elastic). My husband used to scratch holes in his boxers and he no longer itches and creates holes since wearing these, no more constantly pulling his ... MoreThis is my second review on these. My husband loves them so much they are the only ones he wears now. The one on the left is from new this Christmas the one on the right is over two years old(3 father's days ago) we bought the 15 pairs deal each time after the first pair purchase to check sizing. As you can see the elastic is starting to perish as I expect it would after that many wears. They have slight fading due to wear and drying in the hot Mildura sun but overall no noticeable shrinkage or creased elastic(it helps to shake them after washing before hanging up as the spin cycle in the machine does crease the elastic). My husband used to scratch holes in his boxers and he no longer itches and creates holes since wearing these, no more constantly pulling his undies out off his crack. They are a firm fitted garment and are not designed to be loose in any way. He says "they really accentuate my package" followed by "bit misleading like I'm false advertising". He is a Police Officer so works long days wearing heavy equipment, has to run after and restrain people and sometimes sit for long periods of time in a hot vehicle, so these have stopped him getting heat rash from sweating and chafing. But in all seriousness he LOVES these undies and has worn them to death, we've had to throw out two pairs from our original purchase but most of them are only showing these slight signs of coming to their end of life cycle. Also do not wear these swimming, the two pairs we had to throw out were the ones that were worn in the pool so I suspect the chlorine did them in. People need to be realistic about how long they expect underwear to last. CK and Bonds do not last anywhere near as long as these ones have, do not fit in the same way at all and are made from completely different fabrics so cannot be compared with these boxer shorts, we used to go through so many pairs of them it was a joke. You need to measure the person intended to wear these and choose based on the recommendations on the website, sizing is true to size but different from other brands, hubby was a small to medium in other brands and is a small in these. As a bonus we no longer get holes from scratching his crack because that has literally stopped so they are laying much longer than other underwear he used to wear.

originally posted on stepone.life
Step One Trunks are the Best
14 November 2023

My boyfriend absolutely loves his Step One trunks. They are extremely comfortable and I only buy him these trunks as of three years ago as he says they are the most comfortable trunks ever. Excellent level of quality A+++👌 The trunks fit great and I have got twins (2 pairs) of Black Currants, Ahoy Sailor and Smashed Avo. I will be getting my boyfriend more pairs of Infernos, Scorpians, Butter Nuts and Black Currants in the new year. The price is definitely worth it. I also love all the colour options and their quirky names

Leah D. originally posted on stepone.life