Lightweight, breathable eucalyptus fiber provides next-level comfort Cushioned midsole offers all-day support Machine-washable materials keep shoes looking like new These silky-smooth, breathable shoes, made with responsibly sourced eucalyptus fiber, tread lightly in everything you do. Best For: Walking, warm weather, everyday wear. Temperature-Regulating Material: Lightweight, breathable eucalyptus fiber provides next-level comfort Versatile Design: Classic, go-with-anything style that’s great for travel Where It’s Made: Vietnam Sustainability The Tree Runner has a carbon footprint of 4.99 kg CO2e. As a certified Climate Neutral business, Allbirds offsets its emissions by funding high-impact carbon projects. FSC-certified TENCEL™ Lyocell (eucalyptus fiber) upper SweetFoam® midsole made with sugarcane-based green EVA Bio-based TPU eyelets Shoelaces made from recycled plastic bottles Castor bean oil-based insole foam ZQ Merino wool heel lining Some styles may include a wool-lined insole instead of the TENCEL™-lined insole shown in the image Care Remove the laces and insoles. Place the shoes in a delicates bag (pro tip: a pillowcase works too). Select a gentle cycle with cold water and mild detergent. Shake out any excess water and let them air dry. The shoes will return to their original shape after 1–2 wears. Want to give them a fresh look? Swap in some new laces and insoles.