NEW UPGRADE SOFT SEAL RING Soft Medical Grade TPU material, latex-free, no stimulation to the skin.High-quality material makes the cast shower ,Updated Design Makes it Reliable, Reusable and Durable. AVAILABLE IN 2 SIZES Size:S: - will fit most Child teens weighing 65 to 75 pounds. Size:M: - for people weighing 75 to 110 pounds.This product is only used to protect children below the knee, if you need to protect the part above the knee you need to buy a full leg waterproof cove EASY TO PUT ON AND OFF Easy to Put on and Off & No retaining ring Design, soft and snug material makes this ediatric arm cast protector easily pull on and off in a non-painful way.IDEAL FOR MOST Child Made of high-quality silicone, PVC and PP, it is most suitable for chemotherapy showering and bathing. NOTE ! : Size S: Please measure your leg circumference before ordering. Length up to 22.8inch(58cm), circumference stretches from 9.8 to 14inch (25-35cm) NOTE ! : Children with jumbo casts or splints will need to measure the widest part of the cast in order to match the right product.