ULTRA THIN DESIGN: Suitable for walking or casual hiking shoes, sport shoes, leather shoes，high heels，work shoes and boots. Comfort and cushioning for all types of leisure or everyday footwear BREATHABLE: insoles features a breathable functional layer,Softer and less tiring，Soft cushion surface，Sweat absorbing knitted fabric， Mezzanine hi-poly，Comfortable fabrics Softfilling Not easily deformed NO BLISTERS: The cushioning insole helps keep your feet in place, reducing movement within their shoes helping to avoid rubbing and painful blisters. The insoles are thin, average thickness is around 3.5 mm. Easy Trim-to-fit material allows you to easily customize size