SUPER SHOCK ABSORPTION: Elastic PU insoles with GEL padding under the heel and forefoot are designed to fully absorb shock and reduce foot stress with every step. They are suitable for high intensity exercise and help reduce exercise-induced fatigue, such as shin splints, runner's knee, plantar fasciitis. THREE INVISIBLE HEIGHTS: No one will know the secret to your height increase. The three optional heights are perfect for different occasions like a meeting, date, wedding, shopping or any other event where a camera is lurking. The adaptable size adapts easily to your feet and to all types of shoes. ALL-DAY COMFORT: Odorless breathable mesh fabric wicks away moisture and keeps your feet feeling fresh all day. The anti-slip texture under the sole prevents the soles from slipping in your shoes. Three-dimensional support designs help maintain stability to make your feet more comfortable. SPORTS, WORK AND LEISURE: Orthopedic insoles are perfect for improving performance and reducing fatigue in everyday life. Good cushioning effect can reduce the impact on joints and muscles, relieving the pain inflicted by leg length discrepancies. Our replacement insoles are suitable for boots, sports shoes, sneakers, high-tops and tennis shoes. (You will receive a pair of insoles of your chosen height). Women: 139.7g/pair for 2.3cm, 168.3g/pair for 3.6cm Men: 168.2g/pair for 2.3cm, 204.3g/pair for 3.6cm