Cymed Inc One-piece Colostomy Closed-end Pouch with Plain Barrier and MicroDerm™ Thin Washer 1-1/2" Opening, 8" L, Cut-to-fit, Opaque Cymed provides you with a variety of pouches for every type of ostomy. All are composed of Cryovak odor-proof material and have a waterproof comfort backing. Cymed pouches are latex free and are available in either clear or opaque.