Smartwool Performance Run Targeted Cushion Low Ankle

4 Degree Elite Fit System The bi-elastic construction provides faster flex and recovery for the entire foot. These bands are located at the ankle, arch, and upper and lower instep areas. Indestructawool Patented technology for outstanding comfort combined with durability. Virtually Seamless Smartwool has smoothed the toe seams to ensure the ultimate fit and comfort in the shoe. This technology is found in Smartwool's performance and everyday socks.