Size Medium: Thigh Circumference: 19-23 Seal-tight Protector Knee Cast And Bandage Protector Is A Safe Economical And Effective Covering For Post Surgery Dressings Or Other Bandages Covering The Knee. Slides On Easily And Open Design Allows Freedom To Stand Or Walk Without Interference. Easy Application Eliminates Need For Pumps Hook & Loop Closure Straps And Adhesive Tapes That May Irritate Skin. Made Of Tpe High Performance Thermoplastic Elastomer That Stretches Easily Folds Compactly And Maintains Waterproof Seal. Reusable. Not Made With Natural Rubber Latex.