This wetsuit changing mat is a fully waterproof mat and has been designed to change on, so keeping sand and dirt out of your car and wetsuit. Great when changing in car parks as well as on the beach. 

Once your wetsuit is off, simply place in the middle of the mat and close with the strap to wrap all the wet gear up and keep your car dry. Very practical bag. 

Added bonus: Can be used to keep clothes dry while you're in the water, in case it rains!