Premier Solutions Double Air Foam Insoles are designed with extra thick cushioning to increase foot comfort. The two layers of ultra-soft foam are ventilated to absorb moisture, ensuring your feet are kept cool and dry. Trim the insoles for a custom fit, ensuring they stay in place. HOW TO USE: Separate left and right insoles. Insert into shoe fabric side up. Insoles must lie flat. If needed, carefully trim with sharp scissors. Following instructions on enclosed sizing card.