Réponse de SkatePro:  Wrist guards are meant to protect your wrists, and if you crash or fall, they usually receive the biggest impact. Depending on the situation they may also get scratches or even get broken instead of your wrists - which is their job :) If your wrist guards start to get shabby without a reason, it is advisable to contact us, so we can also look into the case. If you don't receive any washing instructions together with the item, you can still use a mild detergent and wash them with hands. This also prevents uncomfortable odors from appearing. /Tanja