The Mammut Tweak Headband is our go-to recommendation for wanna-be paleontologists who want to wear a wooly mammoth on their head. We also like the fact that it keeps our ears warm, too, thanks to its acrylic-wool blend and fleece lining. responsible collection: recycled/repurposed material: [face fabric] 50% wool, 50% acrylic, [lining] 100% recycled polyester style: headband season: winter claimed weight: 1.7oz