The BLS 4100 Next half mask in size M/L is part of the category III personal protective equipment from the 4000 Next series. It includes filters and pre-filters that protect the nose and mouth from gases, fumes, and toxic particles. Made in Italy, it features high-quality materials for reliability and comfort.
The silicone facepiece of the half mask is 25% lighter than traditional half masks, making it one of the lightest options available. The front mask, which uses adjustable elastics, incorporates the innovative Drop-off system. This system lets users put on and take off the half mask quickly and safely, without removing the headpiece.
The BLS filters offer A2P2 NR protection:
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BLS 211 filters: Protect against organic gases and vapours with a boiling point above 65°.
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BLS 301 pre-filters: Protect against dust, mists, and fumes with a minimum filtration of 94%.
Both filters contain a layer of activated carbon for better filtration, blocking unpleasant odours. The B-lock technology ensures easy and secure filter attachment with a latching effect, ensuring proper positioning.
The BLS 4100 Next half mask meets the EU Regulation 2016/425 requirements, complying with EN 140:1998 and EN 143:2007 standards.









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