From the mornings at the trailhead to wandering streets of Spain, the men's PhD OUTDOOR LIGHT Mid Crew Socks offer serious performance for hikers and travelers alike. A multi-sport weave of 57% merino includes Indestructawool technology – providing the ultimate durability in critical areas. Smartwool's 4 Degree elite fit system uses elastics for superior stretch and recovery, keeping these socks in place securely. Another feature is the Virtually Seamless toe, which extends comfort in any trail footwear. The Mid Crew height sits ideal for lower profile boots.