Ready to use respiratory kit with 3M™ Reusable Half Face Mask 7503L and 3M™ Filters offering A2P3 R protection Half mask with a soft silicone face piece for comfort Bayonet connection fitting system to easily connect filters to mask 3M™ Cool Flow™ Valve provides easier breathing and reduced heat and moisture build-up Low profile, twin filter design half mask for a balanced secure fit