- Full grain waterproof leather. Exclusive XC4 waterproof performance and comfort. Seam-sealed construction. Patent-pending Axis Chassis System for support. Dual width removable footbed to accommodate a custom orthotic or wide foot. 100% recycled J&M Smart Degree Technology" linings for temperature control. Removable, multi-density footbed with memory-foam and contoured arch support. High rebound, ultra-comfortable TRUFOAM midsole. Highly-durable, rubber outsole.