The Dririder wet weather apparel is designed as an overgarment to be worn over existing riding gear. Bikebiz suggests purchasing a size that is at least one size greater than your riding jacket/pants so as to allow for unrestricted movement. Below is a table of suggested sizing options. This is to be used as a GUIDE ONLY. If you are unsure as to what size will be suitable please contact us, and our Team will only be too happy to help.