To use these arm protectors, simply slide them onto your arms. They're designed to fit snugly but comfortably. When riding, they'll keep your arms dry by wicking away sweat and protect them from the sun. As for care, hand - wash them in cold water with a mild detergent. Avoid using bleach or fabric softeners. After washing, gently squeeze out the excess water and lay them flat to dry. Don't wring them as this could damage the fabric. Store them in a cool, dry place when not in use.