[ Material] ABS
[Style] folding type
[Packing] 1 / PE bag, inner box, 20 / box
[Features] lined with a good cushion, can prevent high decibel noise, headband can be folded, light, easy to carry bright blue, red easy to check, safe, comfortable
[Usage] Recommended for sleep, learning to use. Can play a role in improving sleep, concentration, protection of hearing and so on.