SPEEDSHEER M size blue geometric pattern socks, perfect for trail running. - Color: Blue geometric pattern - Brand: SPEEDSHEER - Size: M - Design: Asymmetrical design - Use: For trail running Dustproof, windproof. Not waterproof. Thank you for viewing. Attach the hook to the shoelaces to secure the front. The back has adhesive on the back of the included 5x20cm Velcro, which you cut and stick to secure. If you run a rubber string through the arch of the shoe and sew it to the gaiter, the Velcro on the heel may not be necessary. Compatible shoe sizes: Approximately 25.5~27.5cm