The merino is great at ventilation but also allows a bit of natural warmth. Great for any weather. The wool is soft and dries quickly. Resists chafing better than cotton or elastane blend underwear. Handles odour well when doing outdoor activities and is easy to clean while hiking or travelling. I have a few sets of these and will be using them to bike across the US this summer. Only negative is that the waistband likes to fold over on itself, but this isn't a major issue and won't stop be from buying in the future.

Great for the first few months, but these start thinning along the saddle seam that joins the front half to the back half. I've also had to mend a few along the side seam where the surged seam didn't catch both pieces of fabric. Not as "premium" as you'd expect. For comparison, underwear from a smarter wool brand is older and has not shown any similar signs of wear. Only expect to get a year out of these.

I've given up using bike shorts, in favour of these durable, non-irritating, comfortable merino undies.I wore them almost continually on a 4000km cycle tour last European summer over 3-4 months in 38C stinking hot weather, and never had the customary jock itch, seam "lump" or even infected sweat pores or hair follicles. Hastily rinsing them in fresh water was all we managed about every 2nd day due to filthy natural water sources and isolation. I bought another pair on our return as I was so impressed, and there's still no holes or stitch failure