Montbell Lightweight and Compact Anti-Slip Reversible Gripper This is a shoe anti-slip device that can be used on icy, snowy roads and wet wooden walkways. It can be quickly attached and detached, and is lightweight and compact, making it convenient to carry. Compatible shoe size: Free size Brand new, unused. Shipping via Yu-Packet. We are very sorry, but due to this being a personal item purchased after purchase, please refrain from purchasing if you are nervous about this. Please ask any questions in the comments section.