100 pairs of corded ear plugs

10 fan speeds

but also to be comfortable while they're doing it

Their patented EarLock® retention rings lock the earplugs in place

non-toxic silicone

Hellberg Xstream LD Bluetooth Helmet Music Earmuffs (SLC80 25dB, Class 4) Bulk 100 pairs of corded earHearing protection with Bluetooth for music streaming. Xstream connects via Bluetooth to your phone for wireless music streaming and phone calls. Your hearing is protected while you enjoy your favourite music with excellent sound quality, and the built in speech microphone allows you to make phone calls. A boom microphone is available as an accessory for those who need clearer speech quality in high noise. Active listening microphones in each earcup