Thank you for viewing. These are Japanese-made health sandals with bumps. The instep is laminate coated, making it resistant to dirt. The insole is black, which doesn't show dirt easily, and the sole is white, so it won't leave marks on the floor. They can also be used outdoors. ◇ Returns and exchanges are not accepted. 　We will answer any questions until you are satisfied. ♡ We will ship via Yu-Packet Post. 　We may need to slightly compress them when putting them in the mailbox. 　Please understand. We look forward to your purchase. Room shoes Indoor shoes Slippers Indoor Garden shoes Outdoor shoes Outdoor