Soft and warm - the Midweight Merino Wool Tube. The Midweight Merino Wool Neck Warmer by Buff is a loop made from warm, soft merino wool. The seamless construction provides extra comfort and the design allows for using the neck warmer multi functionally. Eco-friendly by using natural, sustainable materials and manufactured in an animal-friendly way. No sheep were harmed, Buff vouch for that.