Function: perfect cushion for absorb shock to arch. Dr. Foot's arch support cushions relieve pain and pressure related to plantar fasciitis, tendonitis, arthritis, flat feet and a variety of arch problems. Instruction: made of soft and durable medical-grade polyurethane gel material, safe to human body. Self-adhesive design can be reused and washed. Before applying, please make sure that there is enough space in your shoes to accommodate the cushions. Remove plastic film on bottom surface, stick it on the shoes and make the support spot under your arch. Size: can be worn with a variety of shoes including high heels and running shoes for both male and female. This upgraded version has higher arch support and made of softer material, better stickiness. Important note please follow the recommendations below for better product longevity: before applying the product to any insole, please ensure the insole is dry, removing any moisture and sweat. It is recommended to use separate support insoles for each pair of footwear. Once the product has been stuck to an insole, please do not remove it as this will ruin the stickiness of the support insoles.