Design: FSC-certified TENCEL(TM) Lyocell (eucalyptus tree fiber) and ZQ Merino Wool blend upper Durable, water-repellant finish helps keep shoes from getting soggy ZQ Merino wool and recycled polyester ripstop Snug, sock-like collar blocks debris Bio-based TPU seam tape and heel counter Bio-based nylon eyelets Shoe laces made from recycled plastic bottles In-Shoe Comfort: ZQ merino wool heel lining Castor bean oil-based insole foam SweetFoam(R) midsole made with sugarcane-based green EVA for added comfort Durability & Traction: Tear-resistant ripstop mudguard protects feet FSC-certified natural rubber outsole Multi-directional 4mm lugs for grippy traction on any terrain Additional Details: Best For: Trail running, traction, rock/foot protection Weight: 12.36 oz Heel Drop: 7mm (Forefoot: 18 mm, Heel: 25 mm) Carbon Footprint: 16.3 kg CO2e Care Guide: Pull out insoles and laces, slip shoes into a delicates bag, and toss into washing machine - gentle cycle with cold water with your favorite mild detergent. Shake off any excess water and air dry.