How It Fits These board shorts combine a Slim Fit liner under a fixed-waist shell. The integrated liner is form-fitting around the butt and thighs. Made For Big waves and bold moves. Betawave comes equipped with an integrated DropTemp™ Cooling Hydro Liner and the BallPark Pouch™, providing unreal support in and out of the water. Built In Tech DropTemp™ Cooling Hydro Liner, BallPark Pouch™, rear patch pocket with security key loop, front pockets, stash pocket on liner leg, fade-resistant shell, odor-resistant liner, quick-drain pockets. Made From Shell: polyester (88%) and elastane (12%). Liner: polyester (87%) and elastane (13%). Measurements Shell 19" outseam, 9" inseam; liner 5" inseam. Care Instructions