It's made with lightweight
The Allbirds Tree Runner is a breathable and lightweight sneaker made with responsibly sourced eucalyptus tree fiber that feels silky smooth and cool on your skin
and stable so you can weather any weather
The Allbirds Wool Runner is the orginal wool sneaker that started it all
Made with plant oil-based foam from sustainably grown castor beans
Women's Wool Runners - Hazy Indigo (Blizzard Sole) Size:7 It's made with lightweightThe Allbirds Wool Runner is the orginal wool sneaker that started it all. Called the world's most comfortable shoe, it's flexible, supportive, astonishingly soft, and machine washable. The Wool Runner is breathable, lightweight, and can be worn sockless. Best used for walking, cooler weather, and everyday casual wear.