WEAR-WITH-EVERYTHING VERSATILE STYLE: Wear-with-everything classic style shoe, with enhanced cushioned foam midsole provides all-day reliable comfort, ideal for walking, travel, warm and cool weather wear. This style is available in whole sizes only. In between sizes? We recommend that you size up. | THERMOREGULATING WOOL MATERIAL: Our cozy, warm ethically sourced ZQ Merino wool upper provides itch-free unbeatable softness, the superfine, ultra-premium natural wool fibers excel in regulating moisture & body temperature to keep you moving comfortably from day to night. Natural alternatives are the future, we replace petroleum-based synthetics wherever we can - natural materials are soft, breathable, and better for the planet. | ALL-DAY COMFORT FROM NATURAL MATERIALS: Allbirds delightfully bouncy Sweetfoam dual-density midsole is engineered from raw Brazilian sugarcane providing wear-all-day premium comfort and support. Removable insoles made from castor bean oil are specially contoured to provide flexible, cushioned support with enhanced moisture management. | MACHINE WASHABLE: Allbirds shoes are machine washable! Our all-natural materials will not lose any performance or shape after being washed, simply place in a delicates bag and wash on cold gentle cycle; air dry for 24 hours. | ALLBIRDS I Est. in 2016: Allbirds created an entirely new category of shoes inspired by natural materials, driven by simplicity in design, confidence in comfort, and responsibly sourced & made from nature. Carbon neutral business certified by Climate Neutral Energy & B Corp Certified.