Designed to slip underneath your arch and metatarsal to give you extra support and comfort. With a self-adhesive backing to apply to the shoe. Maximum comfort from a quality polymer gel. Slim & light weight. If the insoles stop sticking, simply handwash with a mild soap and water then air dry, this should help reenergise them. To use - Dry wipe the inside of shoe clean. Remove clear plastic adhesive backing on the insole and place in shoe - tacky side down. Align insole with arch position, press down to adhere.