1. Rubber EVA foam, extremely strong; 2. Two swival handles, comfortable; 3. No protruding parts on the bottom; 1. The combination of the Rubber and EVA foam, extremely strong and excellent resistant;2. Two swival handles, specially designed for the sliding, very comfortable for the users;3. No protruding parts on the bottom, which can protect your fibreglass;4. More color available; Racer Mat