The Timberland Men's Jackson's Landing Waterproof Boots are made with a traditional handsewn construction and ReBOTL™ recycled fabric lining for eco-friendly comfort. Products with ReBOTL™ material contain at least 50% recycled PET (recycled polyethylene terephthalate, the stuff plastic bottles are made of) excepting trace materials. The leather upper is sourced from a tannery-rated Silver for environmental responsibility by the Leather Working Group, a multi-stakeholder auditing group. The Gripstick™ Rubber outsoles provide dependable traction on both wet and dry surfaces, designed for a large amount of surface contact through wide or multiple lugs with square leading edges.