Thermal inertia materials maintain preferred temperature through activity pauses

The 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.

Impact absorbing crash pads soften landings on hard surfaces.