Premium Timberland Leather: By purchasing this product, you are supporting Leather Working Group certified tanneries. ReBOTL Material: The ReBOTL material used in Timberland footwear and accessories contains at least 50% recycled PET. 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. Rubber lug outsole