If it says UA Vanish in the name, that means it's one of their fastest-drying materials. These are ultralight, durable, breathable, and dry super-fast to keep him cool. Fit & Design: Loose-fit shorts Half-back exposed elastic waistband delivers all-day comfort Mesh panels for added breathability 4-way stretch material moves better in every direction Lightweight stretch-woven fabric provides superior mobility and durability Open hand pockets keep his small essentials within reach Additional Details: 7" YMD inseam Machine wash cold; Tumble dry low