Foldable or cup shaped masks. It is best if you experiment to find the model that suits you best.
Effective filter material captures and effectively retains particles at the same time as giving very low breathing resistance.
Foldable model with an integrated layer of activated carbon that protects against bad-smelling organic vapours and gases below the hygienic limit value.
Valve that very effectively ventilates moisture, heat and carbon dioxide and provides comfortable use throughout the working day.
Flexible, soft nose seal, on some models around the whole inside of the mask.
Endless, woven elastic band or two woven elastic bands with 4-point buckles for perfect alignment and fit.