At the heart of Tutto's patented design is a durable and resilient, yet lightweight, fiberglass frame that can easily handle one or two pieces of luggage or gear - up to 100 pounds - stacked on top. The load is evenly distributed on four caster wheels, which provide a natural, no-tip balance, while lessening the weight and strain on your back and arms. A removable, rigid U-shaped puller bar anchors each side of the frame for easy and controlled maneuvering. In between uses, your Tutto collapses to just 3 inches wide for easy, compact storage. Tutto has been recommended by back specialists and physiotherapists and has even received the National Arthritis Foundation Design Award for its ease of use.