The Gas Mask Model KGGMF-14B has a full acrylglass visor which offers a wider visual view. The filter will be installed in front. Features Filter included: 1 NBC-Filter Cyanogen chloride lifetime: approx. 50 min Inhalation resistance: 186 Paa (30 l/min) Exhalation resistance: 100 Paa (30 l/min) Visual field: not less than 70%, binocular visual fields not less than 60%, below visual field not less than 40% Material: silicone Weight: 0.3 kg Sizes: one-size