Ausangate Alpacor Heavyweight Ribbed Hiking Socks For Women 85% Alpacor/ 15% Nylon Imported Compression band across the arch Four-ply double looped inner construction for comfort. Instep and ankle compression bands prevent socks from bunching up inside boots. Soft rib knit and welt cuff keeps socks in place. Flat toe seam. Machine wash and dry alpaca fiber socks.