The Smartwool Run Low Ankle Socks 3-Pack covers road and trail miles with three pairs of merino wool running socks. Targeted cushion adds padding in strategic spots without added bulk. The merino wool blend manages sweat and resists odors in any season. What Our Gearhead(R) Experts Are Saying:"On long runs, the small tab at the back of the heel keeps the sock up where it belongs, so the fabric stays flat against my skin instead of folding into my shoe. The toe seam lies flat inside the shoe, so by the end of a long run I'm thinking about the route and not my feet."