Zero Shock insoles offer superior comfort and performance thanks to: Molded foam base, UltraCush® cushioning, dynamic arch support, HyperFoam+ top layer controls moisture and prevents odors, and the square pattern improves cushioning while keeping the insoles lightweight. Use: Customizable fit (cut to desired size). Compatible with all TOWORKFOR models. Advantages: Comfortable; High Durability; Stability; Recycled and biodegradable materials; Eco-friendly.