Peerko Adults Insoles - Winter Woolstep – Warm, Breathable, and Barefoot The Peerko Winter Woolstep Insoles are designed to provide extra warmth and comfort for your feet during colder months. They are made from natural sheep's wool with a middle layer of aluminium foil which insulates and prevents the penetration of cold. The bottom layer is made of latex to keep the insole in place. They are 5 mm thick, but only about 2.5 mm when stepped on, perfect for customising the fit of your Peerko shoes. To maintain hygiene and extend the lifespan of your footwear, it is advisable to remove the insoles after each use and let them dry freely. Regular replacement ensures freshness and long-term comfort. These insoles are compatible with all Peerko shoes and boots with the exception of the Peerko Canvas Shoes, Ballerinas and Slip-Ons. Choose Peerko Winter Woolstep Insoles for a cosy, breathable, and barefoot-friendly addition to your footwear, keeping your feet warm and comfortable all season long.