The Alpha Sentinel filter series provides protection against hazardous gases, vapors, and particles across a wide range of industries. Fully compatible with Alpha Sentinel Full Face and Half Mask, ergonomic filters offer incredibly low breathing resistance when fitted and optimized for volume. FEATURES AND BENEFITS: · Gas filters are filled with carbon to optimize area and result in a smaller, lightweight case that limits the field of view when worn. · Contains particulate P3S and P3H pleated filter media, providing more surface area for reduced respiratory resistance. · Alpha Sentinel filters are equipped with simple connections for easy fitting. · Weighing less than 115 grams, all filter combinations are lightweight and can be used with both Full Face and Half Masks.