Urocare - Reusable Leg Straps For Sports Bag are designed specifically for use with Urocare sport drain bags. Urocare recommends fastening the sports bag above the knee or thigh. Because this bag only has two eyelets, only one leg bag strap is required. The strap fastens using velcro for flexibility and a secure fit. Sizes: small-medium and medium-large. One strap is included per package.