The Red Wing Shoes Quadrex Insoles feature a four-layer footbed system made with a polyurethane base and gel pad material, providing comfort and support for men's size 8D or women's size 10D. These insoles are designed and manufactured in the United States, ensuring quality and durability. Perfect for those looking to enhance the comfort and performance of their footwear, these insoles come in a pair and are a great addition to any shoe care routine.