The Fusion Repreve Double Layer Walking Sock combines the 1000 Mile double layer with addtional padding for extra comfort. Made from recycled materials the two layers reduce friction, mitigating the risk of blisters. The mid-calf length 1000 Mile Fusion Walk Sock breaks the mould with innovative design and material technology to provide a sock that offers everything. Double layer - The 1000 Mile double layer sock’s blister free guarantee with a soft durable outer and wicking inner. Padded comfort and protection, including fulllength achilles tendon padding. Offers volume and warmth which is perfect for 3/4 season walking.