via ww2.hammacher.com

Answer: This is the umbrella that is worn on the back, providing rain and sun protection while keeping the hands free. Ideal for use when burdened by packages, a dog's leash, or other activities that require both hands, the umbrella fits into a pack strapped to the back. Unzipping the pack, removing the umbrella and attaching it to the pack's built-in, adjustable support rod takes seconds; the pack slips over the shoulders and secures around the waist with a plastic buckle. When deployed, it covers its wearer with a 39 1/4"-diameter polyester canopy. The umbrella's canopy collapses easily against its pole and slips back into the pack's pouch when the weather clears. Black. Closed: 36" L x 2 1/4" W. (1 lb.)