How to Use-- Clean and dry your shoes. Remove the film on the insole. Stick it in the correct position, and press tightly. Cutting Free--You can choose your own size, the appropriate insoles more fit the foot curve. You can also trim the inserts for more fitting your shoes.Great for flats, heels, pumps, wedges, and sandals. Self-adhesive--Non-slip design, easy and firm bonding. Leave the insoles in place at all times. The frosted feeling on the surface of pig skin has an anti slip effect. Effective shock absorption effect--For pigskin slippers insoles, it works well for cushion and "feel", providing softness and comfort, especially when worn with thin socks. Premium Pigskin Material-- Designed specifically for flip flop thong. Our flip flop insoles are made of high-quality pigskin. Pigskin has the characteristics of breathability and absorbs sweat easily,keeping your feet dry all day and away from odors.