Our popular junior jammer, now with better eco-credentials. Retaining the streamlined cut and internal drawcord waist that make it so comfy during lessons and training, it’s now made from 50% recycled materials. Quick to dry and 100% chlorine resistant, it’s ideal for regular pool sessions.Secure Fit - internal drawcord allows you to adjust the fitQuick Dry - dries faster after your swim workout50% Recycled – one of the yarns is made from 100% post-consumer waste, such as recycled plastic bottles.
Our popular junior jammer, now with better eco-credentials. Retaining the streamlined cut and internal drawcord waist that make it so comfy during lessons and training, it’s now made from 50% recycled materials. Quick to dry and 100% chlorine resistant, it’s ideal for regular pool sessions.Secure Fit - internal drawcord allows you to adjust the fitQuick Dry - dries faster after your swim workout50% Recycled – one of the yarns is made from 100% post-consumer waste, such as recycled plastic bottles.
in 3 offers
The lowest price for Speedo Boys Endurance+ Jammer Navy 4 right now is $38.57 at Amazon.com.au, compared across 3 retailers.
The all-time low was $27.89 on 20 Apr 2026 — today's price is 38% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 10 Nov 2026.
Speedo Boys Endurance+ Jammer Navy 4
Our popular junior jammer, now with better eco-credentials. Retaining the streamlined cut and internal drawcord waist that make it so comfy during lessons and training, it’s now made from 50% recycled materials. Quick to dry and 100% chlorine resistant, it’s ideal for regular pool sessions.Secure Fit - internal drawcord allows you to adjust the fitQuick Dry - dries faster after your swim workout50% Recycled – one of the yarns is made from 100% post-consumer waste, such as recycled plastic bottles.
Our popular junior jammer, now with better eco-credentials. Retaining the streamlined cut and internal drawcord waist that make it so comfy during lessons and training, it’s now made from 50% recycled materials. Quick to dry and 100% chlorine resistant, it’s ideal for regular pool sessions.Secure Fit - internal drawcord allows you to adjust the fitQuick Dry - dries faster after your swim workout50% Recycled – one of the yarns is made from 100% post-consumer waste, such as recycled plastic bottles.
Last updated at 10/11/2026 09:22:39
Speedo Boy's Endurance++ Jammer, True Navy, 4-5 Years
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!
Speedo
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!
Speedo Endurance Boys Jammer True Navy / White / 4
Delivery $9.99
originally posted on swimoutlet.com
I so enjoyed my Speedo jammer - that I bought a couple of years ago. So when it wore out, I had no hesitancy in buying the same model, especially when it went on sale at SwimOutlet.What a disappointment. The fit was smaller - but most disappointing is that it was constructed with substantially less material than the previous version - a lighter, less durable, less supportive version of its former self.Will have to try T** or other brands, now.
originally posted on swimoutlet.com
Great fit. And the fabric is an ideal weight for both comfort and mobility. Highly recommend. (Because this is a “jammer” style suit and therefore snug, be aware that the rise is not generous. So you may want to *consider* ordering one size up to ensure a comfortable fit depending upon your physique, particularly for tall swimmers.)
originally posted on swimoutlet.com
These jammers are great! They last much longer and are made of a better material to resist chlorine.I normally wear a 36 but was a bit tight, tried a 38 and fits perfect. If you have a more slender profile I would order your usual sizing. I haven't noticed them stretch out over time or wear thin. These may not be the fastest race jammers but they are great for daily training and hold up well.!
Speedo Boy's Endurance++ Jammer, True Navy, 4-5 Years
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!
Speedo
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!
Speedo Endurance Boys Jammer True Navy / White / 4
Delivery $9.99
I so enjoyed my Speedo jammer - that I bought a couple of years ago. So when it wore out, I had no hesitancy in buying the same model, especially when it went on sale at SwimOutlet.What a disappointment. The fit was smaller - but most disappointing is that it was constructed with substantially less material than the previous version - a lighter, less durable, less supportive version of its former self.Will have to try T** or other brands, now.
Great fit. And the fabric is an ideal weight for both comfort and mobility. Highly recommend. (Because this is a “jammer” style suit and therefore snug, be aware that the rise is not generous. So you may want to *consider* ordering one size up to ensure a comfortable fit depending upon your physique, particularly for tall swimmers.)
These jammers are great! They last much longer and are made of a better material to resist chlorine.I normally wear a 36 but was a bit tight, tried a 38 and fits perfect. If you have a more slender profile I would order your usual sizing. I haven't noticed them stretch out over time or wear thin. These may not be the fastest race jammers but they are great for daily training and hold up well.!
12 year old is around 1.6m tall and quite thin. I struggle to find pants with adequate length and still able to be pulled in enough at the waist. These are a game changer for us! Also, they are well made with material quality speaking for itself. These fit the strict competition swimwear rules, while still being wallet friendly in comparison to similar brand offerings.
My 10 year old son is on a year round swim team. He is wearing size 32. He is bigger than most of other 10 year old swimmers on the team. They wear between size 28 and 32. If you are an adult, size 32 might be on the small side for you. Other than that, I wouldn't say the quality is great, but it is comfortable. My son wears it for swim practice.
I’ve been wearing Speedo endurance jammers for 5 years. They are long lasting and a high quality swimsuit, suitable for both pool and open water swimming. They hold their shape and color despite the combo of chlorine and saltwater environments. Kudos to Speedo for maintaining this durable product!
Appears to be a good quality jammer for the price. Size is always a concern with Jammers. I went by the "true to size rating" of normal by the previous reviews. In the past this has worked for me. This time these jammers were too small. The description relates: Note: Endurance fabric creates a tighter fit than Lycra; consider sizing up. In my opinion DEFINITELY SIZE UP! Save yourself grief. I usually do not rate a product until I use it for at least six months. I believe these jammers will perform well if it meets your sizing needs.
Biggest debate for me on swim suits is which style fits me. I buy them in pairs so one can dry while I use the other set. First pair I bought were the cheap $20 ones, Tyrr I think, and within about 2 months, they went from black to kind of grey, fuzzy, and very baggy. Turns out the grey color was from the elastic stretch material that failed. Same for the baggy, though I wish that was because of weight loss.... I stepped up to some Nike short shorts types, which I liked, then when they wore out, I got some speedo Jammers. The only problem I have with the Jammers is that I am built like a fullback, so tree trunk type legs. They tend to pull down towards my knee rather than staying up. If I had 'bird' legs, they would probably fit better. Only wear issue I have had ... MoreBiggest debate for me on swim suits is which style fits me. I buy them in pairs so one can dry while I use the other set. First pair I bought were the cheap $20 ones, Tyrr I think, and within about 2 months, they went from black to kind of grey, fuzzy, and very baggy. Turns out the grey color was from the elastic stretch material that failed. Same for the baggy, though I wish that was because of weight loss.... I stepped up to some Nike short shorts types, which I liked, then when they wore out, I got some speedo Jammers. The only problem I have with the Jammers is that I am built like a fullback, so tree trunk type legs. They tend to pull down towards my knee rather than staying up. If I had 'bird' legs, they would probably fit better. Only wear issue I have had with any of the shorts is the stitching fails right across my butt. This is the spot where I sit. In the hot tub, on the edge of the pool, or if I am leaning against the wall with my back to it. Same spot on maybe 10 pairs of the trunks. No, I am not squeezing into them. I hand wash in the shower, and don not wring them out. As far as I am concerned, they need better stitching up the back side. The rest of the material seems to hold up very well.
These fit extremely tight, as in compression tight. the sizing measurements are the absolute maximum possible fabric stretch. i'd also call them skinny build only fit. one of my kids could not fit the thigh cuff far enough past the knee even after exchange for largest size, 14yr @85lbs. the other kid is very happy with his, so only the sizing is an issue,
I have been swimming on average at least once a day for about 10 years as a competitive swimmer. I love this suit since it lasts so much longer than the lycra suits. Some of these suits have lasted me a year so my return on investment is much better than with the lycra suits. My only caveat is that you need to watch the seems. When they turn white, be prepared for a suit malfunction since the suits tend to rip at the seems as opposed to wearing out in the fabric like lycra. FYI. If you order your actual size as opposed to ordering a smaller size, your suit lasts much longer,
