NWT SIZE L (Men US 9.5-13) Color: Light Grey Heather Naturally cushy Merino takes the already plush socks to the next level. Merino Wool is a super strong natural fiber that's incredibly soft, will keep you warm in the winter and breezy-cool in the summer, and its natural moisture-wicking properties keep your feet dry and cozy. And that's just the fabric, before all of the sock tech features that come in every pair of Bombas. Features Y-Stitched Heel Cushioned Footbed Honeycomb Arch Support Seamless Toe Stay-Up Technology