The inspiration behind the Timberland Earthkeepers 6" Boot is born out of a desire to create an original, outdoor-tested boot with a smaller environmental footprint than other boots may have. These boots are made with one or more major components containing at least 50% recycled P.E.T. — the plastic used to make soda bottles. The upper is made with premium, waterproof leather for comfort, durability and abrasion resistance, and has a zoned force distribution footbed that spreads impact shock, creating a pressure-free zone. The Smart Comfort™ system delivers durable comfort and support while the shock-absorbing construction of the chassis, midsole and outsole reduces shock to eliminate leg and foot fatigue. This product does not contain PVC.