New in box MSRP $98 Allbirds Tree Runner Size 13 Men’s Hazy Beige Our breathable, silky-smooth Tree Runner is a lightweight everyday sneaker, made with responsibly sourced eucalyptus tree fiber. The Tree Runner has a carbon footprint of 4.52 kg CO2e. Learn more about carbon footprint labeling and our commitments to reduce our impact. Best For: Walking, warmer weather, everyday wear Thermoregulating: Lightweight, breathable eucalyptus fiber provides next-level comfort 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