Brownmed SEAL-TIGHT Freedom Cast and Bandage Protector, Adult Leg
Don't fumble with plastic bags and tape to make a cast waterproof - use SEAL-TIGHT Freedom coverings instead. The key is the SEAL-TIGHT Freedom watertight seal, a flex-seal rubber diaphragm that slips over the cast and fits your leg or arm squeegee-tight.  The diaphragm creates a uniform seal around the limb and permits drainage of water away from the cast protector.  The vinyl arm or leg bag is durable; it is abrasion resistant and minimizes slippage while showering.  With 4 sizes to choose from, you'll find the exact size you need.  SEAL-TIGHT Freedom will withstand daily use during the life of a normal cast.