ALLBIRDS TREE RUNNER JET BLACK/WHITE New without box. Best For: Walking, warmer weather, everyday wear Sustainable Materials: •FSC-certified TENCEL™ Lyocell (eucalyptus tree fiber) upper •SweetFoam® midsole made with sugarcane-based green EVA •Bio-based TPU eyelets •Shoe laces made from recycled plastic bottles •Castor bean oil-based insole foam •ZQ merino wool heel lining •Some models may include a wool-lined insole instead of the TENCEL™-lined insole featured in the image