The Alpha Sentinel filter range offers protection against hazardous gases, vapours and particulates within a wide variety of industries. Fully compatible with the Alpha Sentinel Full Face and Half Mask, the ergonomic filters offer incredibly low breathing resistance with optimised volume when fitted. Particulate P3S & P3H contain pleated filter media, providing more surface area for reduced breathing resistance. The P3P filter is tested to ‘R’, allowing use for more than one shift.