Allbirds - Men's Tree Flyer 2 - Natural Black (Blizzard Sole)

Bring the fun to any run with the Tree Flyer 2. The seriously springy (and seriously sustainable) running shoe you love is back with increased stability, support, and grip to keep those smiles coming mile after mile. Best For: Running, training, fitness classes, home/gym workouts Stabilizing, Sustainable Design: External heel counter (made entirely of recycled content from the midsole foaming process) helps keep your strides steady and reduces waste. Extra Support: Bio TPU overlays on the toe and midfoot adds stability, durability, and lateral support. Easy Slip-On Design: Single-piece knit upper and pull tab make heading out the door effortless. Where It’s Made: Vietnam. Learn more about our operations. Testing & Specs Heel Drop: 8.5 mm (Forefoot: 22.0 mm, Heel: 30.5 mm) Weight: 8.37oz/ 237.3g (W7) | 10.63oz / 301.5g (M9) Sustainability Our Tree Flyer 2 has a carbon footprint of 7.21 kg CO2e. Learn more about carbon footprint labeling and our commitments to reduce our impact. Sustainable Materials: Upper made with FSC-certified TENCEL™ Lyocell (eucalyptus tree fibre) SwiftFoam™ midsole made with bio-based Pebax® Outsole made with FSC-certified natural rubber Shoe laces made from recycled plastic bottles SweetFoam® insole foam Heel lining made with ZQ merino wool Bio TPU upper overlays Care Guide Remove the laces and insoles. Place shoes in a delicates bag (pro tip: a pillowcase works too). Choose a gentle cycle with cold water & mild detergent. Shake out any excess water & set aside to air dry. Shoes will regain their original shape with one or two wears. For a full refresh experience, swap in a new insole and laces. Handy tips: Don’t put them in the dryer. They’ll go back to their original shape in no time. You can hand wash your laces and insoles on their own.