Injinji 2.0 Outdoor Midweight Crew Nuwool Socks Acrylic^Lycra^Merino^Mesh^Nylon^Spandex^Wool Made in USA or Imported Weight: midweight Material: 64% NuWool, 33% nylon, 3% Lycra Height: crew Recommended Use: hiking, camping Manufacturer Warranty: 1 year