Materials: Rubber 50% Polyester 25% Nylon 25% Instruction of use: Put the leg through the brace. Put the knee inside the designed area. When to use: If there are swelling and pain in the knee. If there is a knee sprain. Don't use if allergic to rubber latex. Don't wear if heat-generating ointments have been applied. Helpful for post-operative knee problems, strains, and arthritis. Product features: Designed to give a more comfortable fit to the knee. Designed to fit both right & left knee. Washing instructions: Hand wash only (not in the washing machine) It can be washed with mild soap at a temperature of 30°C (86°F) or below. Keep in the air to dry away from sunlight and heat. Don't use iron, dry cleaning, bleaching or chemical detergents.