Rainbow Sandals at Tillys.com! Rainbow Sandals Background: Since 1975, Rainbow® has been producing top quality sandals. Each Rainbow® sandal is handmade with life support parachute stitching and 2,000 lb tested military specialty straps. Rubber top sandals are constructed of laminated, closed cell sponge rubber, and feature a non-skid surface which molds to the foot thus ensuring a perfect fit for virtually all feet. Each layer of the sole is triple glued with specially formulated, ionized-balanced glue. Even the non-slip rubber bottom sole bears the Rainbow® name, as a trademark of excellence. The above information is from the Rainbow Sandals website.