It is made of elastic polar fleece, and it is suitable for outdoor activieits. It is very fashionable. Different colors are available.Order this sleeping headphone for your next business ! 100% brand new and high quality. Soft and comfy sleeping headband with built-in headphones. Suitable for sleep, exercise, warmth, etc. Headband can also be as a sleep mask.You can finally get the restful night's sleep.Headband can be washed after removing electronics. Frequency Range 20 to 20000Hz.Fall asleep faster, naturally, without drugs. Block out ambient noise without painful earplugs. Welcome to inquiry.