Booster Step is very durable and works great when attached to the Mini and Large Booster Bath. Booster Step also works fantastic with your car door threshold, SUV bumper, couch and bed. Booster Step weighs only 4½ pounds however with its multiple rib system can easily support 150 lbs. The no-slip rubberized step mats insure your dog maintains secure footing. In addition there are four large rubber bumpers located on each corner that insure Booster Step stays in place when your dog enters, or exits. Lightweight and portable (4½ lbs), yet will support up to 150 lbs. Made from ¼″ inch thick UV stabilized virgin polyethylene for long life and durability. Like the Booster Bath, the Booster Step’s cushioned mat is 3/8 of an inch thick and is strong a durable. The patented Booster Step is the most compact, functional and affordable plastic Step available in the market today! We guarantee you will love it or your money back!