Hydra Short XS - Black. The high waisted prAna Hydra Short is at home in the surf. Hyperstretch neoprene is overlaid with a blend of recycled poly and spandex for extra comfort, and a neoprene skin at the waist creates an extra secure fit. Flattering seamlines are contrast stitched for style, flexibility, and durability. A gusset enables a complete range of motion.