Kids Snow Tube: The thickness of the 37 snow tubes has been upgraded to 0.55mm, which can hold it well under extreme low temperature, up to minus 40 degrees and bear friction well. No Leaking Double-duty, Winter and Summer: The heavy-duty snow tube works great for both winter sledding and summer river floating. The two sets of handles make it easy to hang onto and to carry. Sledding with Built-in Handles : The tube is designed with two sets of built-in handles, so riders can steer and maintain control with ease, even on bumpy rides Easy & Fast Inflation with Triple Air Valve -- The air valve can work with most of manual or electric air pumps. Besides, the double locking valve reduces possibility of air leak. You are able to set it up within 1 minute and deflate it quickly.