The Marmot Men's Arch Rock 11 Inch Short is a nylon elastane short for summer hiking. They're abrasion resistant and provide UPF 50 sun protection, so whether you're moving through some brush or just gathering miles in the sun, your tHighs will be covered. Relaxed Fit and stretch for all day comfort. Features of the Marmot Men's Arch Rock 11 Inch Short Bluesign approved fabric Abrasion resistant Nylon fabric Packable, breathable, lightweight Performance woven fabric Ultraviolet protection factor (UPF) 50 Quick-drying Durable water-resistant finish (DWR) Stretch for increased mobility Inseam gusset for increased range of motion Zipper secure side pocket Back pockets Fabric Details 94% Nylon, 6% Elastane stretch dobby 3.7 oz/yd