Cymed MicroSkin - 9" Drainable One-piece Urostomy Pouch (Pre-cut) is a durable urostomy pouch that has a snap cap closure and an anti-reflux design. Waterproof. Washer Styles: Plain Barrier (No Washer), Thin Hydrocolloid (1mm) and Thick Hydrocolloid (2mm). Box of 10.