The Men’s Mt. Maddsen Low Slip-On Boot features Premium Timberland® leather and synthetic leather plus ReBOTL™ fabric containing at least 50% recycled PET plastic. The EVA midsole plus Anti-fatigue removable footbed helps provide long-term cushioning with every step. The easy pull-up style helps get your day started right away. By purchasing this product, you are supporting Leather Working Group certified tanneries. By purchasing this product, you are supporting Leather Working Group certified tanneries https://www.leatherworkinggroup.com/ The ReBOTL™ material used in Timberland® apparel contains at least 40% recycled PET (recycled polyethylene terephthalate, the stuff plastic bottles are made of). The ReBOTL™ material used in Timberland® footwear and accessories contains at least 50% recycled PET. (Excepting trace materials) 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.