If you are looking for a bag to cut/roll/flop, we have the bag for you. Great combo in materials, not only the fabric but our own premium blended resin mix has produced one of the best carpet bags in this speed range. Usage speed friction factor of 4 / 7.5. MADE IN THE USA: Hand-crafted from the highest-grade materials on state-of-the-art sewing machines. Avoid use on cement or similar rough surfaces. The pro bags are engineered to be used on surfaces other than ones like cement/concrete.