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 cool and dry, truly "barely there" thin and breathable. Pouch was well tailored and kept things separated and comfortable without being overly tight. Mostly good things but one deal breaker for me. Had to return them as the inseam is inadequate and to compound the problem, the legs rode up quite badly. Champion Tech Performance won me over.