FXD WS.4 repreve® stretch ripstop elastic waist work shorts in black. New year, new shorts, FXD WS.4 repreve® stretch ripstop elastic waist work shorts are made from organic cotton and repreve® recycled polyester stretch ripstop. Each pair of FXD WS4 repreve® stretch ripstop shorts uses six recycled 500ml plastic bottles that were destined for landfill or the ocean.