Acrylic,Merino,Wool Imported WARM LINING: Lock in body heat and keep your head warm when the temperature drops in the Lid by Smartwool! COMFORTABLE FIT: The Lid features single layer knit construction, blocking out the cold weather while keeping you warm and cozy all season long. NON SLIP: The interior headband liner inside The Lid will securely stay in place and out of your eyes, eliminating the need to constantly re-adjust. VERSATILE WEAR: Whether you are on a ski trip, need a base layer of insulation under your helmet, or are hiking on a cold winter day, The Lid by Smartwool is perfect for all of your spontaneous detours. CARE INSTRUCTIONS: Comprised of 50% Merino Wool and 50% Acrylic, The Lid by Smartwool is easy to care for! Simply machine wash in cold water on a gentle cycle and tumble dried on low. Do not bleach this hat, but you may cool iron and dry clean.