New with tags Size: Medium Color: Black Multitasking at its finest. Use the Solo Merino Liner Sock as a base layer sock to keep you warm and toasty, or as a light stand-alone sock on warmer days. Cold feet can lead to so many not-so-good things when you're outdoors. Blisters and numbness to name just a couple. Stay protected and on the move with these Merino liner socks while doing light outdoor work, on a brisk autumn hike, and on chilly morning walks