I tested several pairs of cooing boxer briefs in my 105 degree Arizona heat as a delivery driver getting in and out of the car 50+ times a day. Lots of movement, sliding, walking and heat. The material was great at keeping dry, but not cool or really breathable. Pouch was well tailored , but didn't quite keep things separated and comfortable. Mostly good things but one deal breaker for me. Had to return them as the pouch tailoring does not effectively maintain separation. Champion Tech Performance won me over.