Women’s S/M (5-8) Alpaca Compression Socks (NWT) In Pink and Blue These socks are designed to maintain blood flow and reduce swelling and inflammation. At the same time, they are soft, breathable, and durable. HYPOALLERGENIC Alpaca fiber doesn't contain lanolin, which is a natural oil that causes allergies. THERMOREGULATING Alpaca fiber has a hollow core, which insulates heat in the winter and helps keep it cool in the summer. MOISTURE WICKING Alpaca fibers wick and push away moisture keeping your body dry and warm.