Men's Penstock Shorts Cual Es La Funcion Y La Estructura Del Nucleo Y Nucleolo. Versatile shorts designed for everyday use The Men's Penstock Board Shorts are stretchy, functional shorts that excel on and off the water. Made using lightweight, fast drying polyester, the Penstock Shorts offer a slim but comfortable fit. A zip fly and lace closure make a secure fit at the waist. Spacious front pockets with mesh drains offer enough space for cell phones, keys, and other essentials while allowing water to quickly flow through rather than billowing up. A rear zipper pocket offers storage for your wallet. Casual, comfy, and capable, the Penstock Men's Shorts will quickly become your favorite shorts.