Harkila Tibro Beanie. The Tibro Beanie is made from 48% merino wool, 48% polyester and 4% elastane. This makes the beanie warm and breathable, but also comfortable, stretchable and harder wearing than all-wool beanies. Features Warm & cozy Breathable Comfort stretch Specifications Main Fabric: 48% Merino/48%Polyester/4%Elastane, Knit Tech Wool Crease-resistant material combining wool and polyester. Stronger and lighter than pure wool without compromising the warmth and softness of wool. Harkila Tibro Beanie - Willow Green