Allbirds Tree Loungers - light and breathable for when you're slipping into any type of warm and sunny situation. Drift though the day in smooth lines and breezy comfort. The Tree Loungers offer cooling comfort to keep things light and airy. They're breathable, lightweight, and can be worn sockless, making them the best travel shoe. Maybe we were going out on a limb when we thought to make shoes out of trees. But thanks to magical sustainably harvested eucalyptus tree fiber, our Tree material is breathable and silky-smooth, complete with a cooling effect to keep things breezy. It's naturally-derived and renewable, too, meaning it's much friendlier to the environment than traditional shoe stuff. Features & Design: lightweight and breezy, flexibly conforms to your movements, help your feet stay cool, silky-smooth material, so soft you can wear sockless, minimizes odor, machine washable, low carbon footprint, padded insole, tree upper, bio-based eyelets, recycled laces, lightweight sole, Allbirds Women's Tree Slip On Shoes, Navy Night, Size 5