Premium Timberland Leather: By purchasing this product, you are supporting Leather Working Group certified tanneries. Anti-Fatigue Technology: A comfort system, adopted from Timberland PRO, designed with shock-absorbing, geometrical technology that returns energy back to the foot to deliver all-day support and comfort. Waterproof Seam-Sealed: Waterproof seam-sealed footwear includes waterproof leather for durable waterproof protection. PrimaLoft Insulation: PrimaLoft insulation is a soft, lightweight compressible down alternative insulation. It uses a patented microfiber structure to help retain warmth, even if the fibers get wet - helping you stay dry, warm and comfortable. Leather lining & a rubber lug outsole