Nike Spark Unisex Lightweight Run Sock (Crew Length/Reflective) Size:Men US 8-9.5 A buckle on the back

A buckle on the back of the cap for size adjustment

Lower leg: 72% NYLON

Engineered Cool Lightweight fabric with Dri-FIT technology help you stay dry and comfortable

and offer different ways to adjust the fit and carry poles and accessories

Nike Spark Unisex Lightweight Run Sock (Crew Length/Reflective) Size:Men US 8-9.5 A buckle on the backCUSTOM SUPPORT. BUILT TO RUN. The Nike Spark Socks create a Breaking2 inspired fit that feels almost like going "barefoot". Supportive where it counts, they feature a ventilated pattern to help keep you comfortable with every step. Customized Fit Snug comfort from the toe to the top of the sock helps create an almost "barefoot" feel. A triangular underfoot arch pattern supports your medial and lateral sides, and lets you wear your socks on either