Rothy's The Flat Women's Slip-On Shoes, Classic Flats Size 7.5 Black Solid The wardrobe staple that does it all. Endlessly versatile, washable and comfortable, our classic flat in black is made to last seasons. Plus, it’s knit from plastic bottles DETAILS Soft, flexible upper in black—which means no break-in period, ever. Comfortable insoles and durable outsoles in black. Fully machine washable, so they’re like new again and again. Our shoes don’t stretch much—so make sure they are not too snug. SUSTAINABILITY Knit from Rothy’s signature thread, which is spun from single-use plastic bottles. Learn more. It took about 11 plastic bottles to knit this pair of shoes. In 2023, Rothy’s factory achieved TRUE Platinum certification, validating that it’s operating with zero waste practices by diverting solid waste from the landfill, incineration and the environment WASHING INSTRUCTIONS Slip out insoles. Pop shoes and insoles into the washing machine. Use cold water, mild detergent and the delicate cycle. No heat, please—always let your shoes air dry