Neck warmer with excellent heat retention. - Product Name: Neck Warmer - Material: Teijin Devilon - Features: Design with excellent heat retention - Size: Free size - Uses: Cold protection, heat retention Thank you for viewing. I tried it on once or twice, but I'm selling it because I haven't used it and it's been sitting around. The box is a little torn. I will ship only the main body, compactly packed.