Features:
Safety Helmet Mounted: easy to clip on a hard hat, and fits most hard hats.
Sound Insulation: Designed with 2 layers of professional noise dampening foam, high sealing solid cup, the earmuffs has good sound insulation effect, no more bothering by noisy noise.
Functional: a simple way to improve sleep quality, reduce noise damage to hearing, avoid noise interference and effectively improve work and study efficiency.
Reliable Quality: ABS shell, 304 stainless steel headband, good resistance to corrosion, heat and oxidation.
Ergonomic Design: soft good tightness ear cushion, comfortable to wear.
Wide Application: for sleeping, sho-oting, in flight, factory, construction site, etc.

Specifications:
Material: ABS+nylon+SS+sponge
NRR: 23dB
SNR: 28dB
Class 5 SLC (80): 29.5dB
Item Size: 21 * 15cm / 8.27 * 5.91in
Item Weight: 307 / 10.83oz
Package Weight: 315g / 11.11oz
Package Size: 20 * 14.5 * 9.5cm / 7.87 * 5.71 * 3.74in