85% Nylon, 15% Spandex Offers sturdiness and stability to their arms with a snug fit Could aid in reducing arm & elbow pain symptoms & swelling May assist in faster & easier recovery after workout Could offer a more effective warm up as muscles get warmed faster May help improve performance with better muscle support Breathable and comfortable as we use anti itch material Insulated to keep their arms warm Could help protect skin from the sun&';s harmful UV rays Stays in place and does not slide down during activity Retains shape even after multiple washes Material made to help reduce odor Allows greater flexibility & motion with no skin chafing or irritation Great support for tennis elbows 2 sleeves per order