Anti-Reflux valve. Esay Drain Filp Lever. High grade vinyl material (PVC) 18 oz. Leg bag is secured with two cloth straps with buttons. Will fit external catheters EasyTap Flip Valve Improved drain valve design that enables convenient, one-handed operation. The valve is both easy and smooth to open and close. There is no bottom cap to lose or misplace. High-Quality Vinyl Bag Comfortable and quiet. Soft vinyl bag with rounded edges and easy to read volume markings. Provides fluid sterile pathway.