The Superfeet Green Trim 2 Fit Insoles boast a long wearing closed cell foam construction for natural shock absorption and a support bridge to provide balance and alignment on uneven surfaces. These insoles also feature control points throughout for increased stability.FeaturesTop cover - Specifically design to reduce friction and heat inside your boots.Long wearing closed cell foam construction - Provides natural shock absorption.Mid foot control point - Offers increased stability for maximum endurance.Rear foot control point - Ensures that less stress is placed on joints and muscles.Support bridge - Provides balance and alignment.