Lp Support Knee Support -Ideal Elastic Brace For Support And Compression. -Made Of Quality Surgical Elastic. -Helps Minimize Further Injury While Permitting Regular Activity. -Materials: 60% Polyester, 15% Rayon, 15% Rubber, 10% Nylon. -Washing Instruction: Hand Wash In Cold Water With Mild Soap. Rinse Thoroughly. Air Dry At Room Temperature. Do Not Machine Wash Or Dry. -Should A Rash Or Irritation Occur, Discontinue Use And Consult Your Physician. Size: Measure The Circumference Of The Knee At The Patella With Knee Fully Extended -Small - 30.5 - 38.1 Cm -Medium - 38.1 - 45.7 Cm -Large - 45.7 - 53.3 Cm