MSA Audible Air Alarm Cartridge Type_HE P100 while the smooth grip prevents

while the smooth grip prevents liquids from seeping in and keeps hands dry and clean

Straps stay aligned with your legs in any position - will not bind behind the knee

Convenient rescue whistle integrated into the chin strap buckle

The long length covers the nose

MSA Audible Air Alarm Cartridge Type_HE P100 while the smooth grip preventsThe MSA Audible Air Alarm comes with an Audi Larm warning device that uses a clear, loud bell to alert users when their air supply is running low. The bell will sound when the cylinder pressure drops to around 400 psig and will also briefly ring each time the cylinder is pressurized to ensure proper alarm function.