DESIGN: •FSC-certified TENCEL™ Lyocell (eucalyptus tree fiber) upper is breathable and comfortable •Shoe laces are made from recycled plastic bottles •External heel counter and flared, geometric midsole help keep your stride steady •External heel counter is made entirely of scraps from the SwiftFoam™ midsole production process IN-SHOE COMFORT: •ZQ merino wool heel lining •SweetFoam® insole foam •SwiftFoam™ midsole made with bio-based Pebax® provides cushion and energy return ADDITIONAL DETAILS: •Weight: 9.49 oz (269 g) •Heel Drop: 8.5 mm (Forefoot: 22 mm, Heel: 30.5 mm) Very good pre-owned condition, some normal wear, and slight discoloration on the midsoles.