How to use: Simply put on this sleeveless baselayer directly against your skin before you start your cycling activity. It works well alone in mild conditions or can be layered under other clothing in colder weather. Notice: Make sure to check the size chart before purchasing to ensure a proper fit. Avoid sharp objects that could tear the mesh fabric. Maintenance: Wash it in cold water with mild detergent. Don't use bleach or fabric softener. Hang it to dry to keep its shape and performance intact.