Deep Heel Cup: Helps prevent heel slip and toes from hitting the front of the hiking boot Arch Support: Stabilizes foot in hiking boot on rough outdoor terrain; reduces stress on feet Carbon Fibre and Foam Insoles: For reliable support and comfort for up to 12 months or 500 miles Moisture Wicking Insoles: Great for your outdoor hiking shoes with long-lasting odour control Superfeet: Comfortable, durable carbon fiber shoe insoles for walking, running, hiking and working