The Ultra Split Short features our proprietary 1:1 Gel Flask Pocketing System which secures nutrition in an anatomic position on body. Our pocketing system is ingeniously integrated into the liner preventing the aggravating dilemma of nutrition bouncing about, allowing you to be self supported over multiple hours and long distances. Transfer Dry fabric provides optimal moisture transfer and stretch with superior hand feel. Fully integrated Float liner uses Transfer Dry fabric powered by Minerale for optimal moisture transfer, faster dry time and odor absorption. 1:1 Gel Flask Pocketing System secures nutrition in an anatomic position to conform perfectly to the body in motion patent pending. One zippered back pocket. Main Body: 84% polyester 16% elastane. Liner: 56% minerale polyester 33% polyester 11% elastane.