The 3D chamois are different from the other chamois that PI has. I don't know WHY they work in hot weather, but I don't notice them once I am on the bike. The Sugoi RS is the only other I've found that I like as much as the 3D - and indeed I prefer them in general. I tried on other versions of the Sugoui shorts/chamois and don't care for them - I love the RS though. Sadly my PI smalls are getting a bit too loose![]()




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