Pearl Izumi - Run Men's Fly Endurance Shorts 84% polyester 16% elastane Imported 2015 Spring/Summer Transfer Dry 4-way stretch fabric provides optimal moisture transfer and stretch with superior hand feel 1:1 Gel Flask Pocketing System secures nutrition in an anatomic position to conform perfectly to the body in motion (patent pending) Elasticized waistband with flat stretch draw cord for unrestricted belly breathing 4" inseam (size medium). One zippered back pocket