These very special socks are knit with our Charcoal Heather yarn (30% mohair/70% black-dyed, 18 micron merino wool two-ply.) The very fine merino wool from our collaborator Hillingdon Ranch and our softest mohair provides these socks with a silky feel. The unique knit of these puffy knee socks provide insulation and warmth without weight or thickness. The “puffy” open knit offers stretch that clings to any size leg, all the way to the knee! Due to the unique qualities of the yarn and Lycra, these awesome socks are available in a medium size that softly adapts to almost any size foot, from small to large (women’s shoe size 7 to 12, men’s 6 to 11.) The reinforced heels and toes provide durability. Because of the high percentage of fine wool, these socks should be washed in cold water only and laid out flat to air dry.