Thank you for viewing. These are Japanese-made health sandals with massage nubs. 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 be used outdoors. Size Guide: M … 25cm~25.5cm L … 26cm~26.5cm ▲ Some sandals may have rubber adhesive protruding between the body and the sole. Some may have paint on the sole. Please refrain from purchasing if you are concerned about this. ◇ Returns and exchanges are not accepted. I will answer any questions until you are satisfied. ♡ I will ship via Yu-Packet Post. They will be slightly compressed when placed in the post. Please understand. We look forward to your purchase. Made in Japan Health nubs Men's