J.B. Icelandic -30 Below Classic Winter Sock (2 Pairs) 70% Merino Wool & 30% Nylon Content- 70% Merino Wool & 30% Nylon Pre-Shrunk Merino Wool - Merino Wool is the finest quality of easy care wool for exceptional warmth and softness. Wool features inherent qualities such as wrinkle resistance, colorfastness, shape recovery (resiliency), and is very breathable. X-Hi Cushion - XHi full terry cushion for added comfort, extra warmth, and protection PLEASE NOTE that it's only the Women's (medium) socks that have the writing FOR A 3 PAIR PACK THAT SELLS WITH FREE SHIPPING FROM AMAZON PLEASE CHECK OUT OUR OTHER LISTING!