Using this Trekmates Rushup GTX cap is easy. Just put it on your head, adjust it to fit snugly around your ears and brow. If you're in windy conditions, you can attach a chinstring to the loops at the earflaps. When it comes to maintenance, it's best to follow the care instructions on the label. Generally, you can hand - wash it in cold water with mild detergent. Avoid using bleach or harsh chemicals as they can damage the fabric. After washing, gently squeeze out the excess water and let it air dry. Don't wring it out or put it in the dryer, as this may affect the shape and performance of the cap. Also, store it in a dry place when not in use to keep it in good condition.