This Women's Timberland® Premium 6-Inch Boot combines classic craftsmanship with rugged style, featuring a ReBOTL™ fabric lining containing at least 50% recycled plastic and an anti-fatigue removable footbed. A nylon shank offers arch support, and the rubber outsole promotes better traction. 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.