DURABLE & REUSABLE: Made of medical grade PVC material, durable and not easy to rip or tear, the waterproof arm cast cover is environmental-friendly, reusable and washable; suitable for daily use, such as therapeutic care, bathing, showering and many outdoor activities ADULT SHORT ARM: Length up to 21.5 inches, circumference from 6 to 15 inches(please do not exceed the range after cast), suitable for fits most adults or teenagers; If the waterproof cast cover is too long simply bunch up the extra space and pump out all the air, conform to the shape of arm COMPLETE WATERTIGHT SEAL: 100% Waterproof Design; With fully tight sealed diaphragm, leak proof and tear-resistant, the arm cast protectors provides excellent protection for dressing, cast and bandage while showering or bathing EASY TO USE: The cast cover is designed to easily stretch over the cast and then the diaphragm self-seal tightly around arm without tape or straps; Simply slip the waterproof ring over your arm then slightly pull down to form a protective waterproof seal UNIVERSAL FIT: The waterproof arm cast cover can be worn on the left or right arm; Recommend to wear it under the help from others if you are in plaster; Please check the measurements provided to ensure full coverage; Not suggest to use while swimming