It consists of four layers of odor-barrier

Marlen Manufacturing UltraLite™ One-piece Pre-cut Drainable Pouch with Skin Shield™ Shallow Convex Adhesive Skin Barrier 1-5/8" Opening

Marlen Manufacturing UltraLite™ One-piece Urostomy Pouch with Skin Shield™ Shallow Convex Adhesive Skin Barrier and E-Z Drain Valve 1-3/8" Opening

primary dressing designed to transfer exudates away from wound into secondary dressing

Marlen Manufacturing UltraMax™ One-piece Cut-to-fit Drainable Pouch with AquaTack™ Hydrocolloid Convex Skin Barrier and Kwick-Klose™ Fastener 1/2" to 1-1/2" Opening

Nu-Flex 1-Piece Adult Drainable Pouch Opaque Trim-to-Fit Convex 3/4" x 1-1/2" Oval All Barrier, Roll Up Collagen/Biologic Dressings It consists of four layersNu Flex One piece Opaque Trim to Fit Convex Adult Drainable Pouch with Nu Comfort Barrier and Closure Clamp 3 4" x 1 1 2" Oval All Barrier, Roll Up.