The HydroLite finally makes it in to our collection as a result of customer pressure, following excellent write ups in Runners World we had a lot of requests for this jacket. In its early days it was a little odd looking and was extremely bizarre to touch when wet. Lets just say that it has evolved and is now totally worthy its style matching its function and the wallpaper paste feel when wet is no more. The ventilation is great and this jacket offers a lot of protection for your money. A medium equates to a size 12. Body length measured at the back from base of the collar is 26.5”.