Black Hiker Alpaca SocksTried and tested in some of North America's most rugged terrains. This is an excellent boot sock that is thick, stretchy, non itchy, breathable, and warm This alpaca blend sock is ideal for those looking for a comfortable sock fit with premium warmth, and or for those on the move. Peruvian alpaca is a natural, technical fiber with remarkable thermal properties. Alpaca allows air circulation on warm days, and heat insulation on cool days. In this way,