Instant Height sells the highest quality and most effective height increasing insoles in the world. Instant Heights are made of polyurethane, with fabric on the top and air cushion in the heel for comfort and shock absorption. The insoles are adjustable from 1. 5″ to 2. 0″ by adding or removing the 0. 5″ detachable insert. Our shoe lift inserts may be used in standard footwear: dress shoes, casual shoes, athletic shoes, boots, and more. All while comfortably concealing the lift and providing a valuable and confidence-building height increase.