Propet Washable Walker Sr is a durable and comfortable sneaker. These active shoes have a machine washable leather upper, PU foam insole and rubber outsole. A padded collar and tongue adds comfort, while a lace-up design ensures a snug and supportive fit. Machine Washable Leather Uppers. PU Foam Insole. Padded Collar and Tongue. Slip-Resistant Rubber Outsole.