Black Solid Serving up unbeatable comfort and effortless street style, our slip-on sneaker in black is a washable staple made for every adventure. Even better? It's knit from plastic bottles. Soft, flexible upper in black—which means no break-in period, ever. Comfortable insoles in black and durable outsoles in white. Features a Rothy’s blue and white heel stripe for a sporty touch. 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.