6-Layer Comprehensive Protection: BASE CAMP M Plus face mask is the third generation of BASE CAMP mask. Adopted EAPI filter technology and Advanced Nanotechnology, the 6-layer filters can filter out 99% exhaust gas, pollen, dust, particles and smoke, etc. Provide reliable protection for daily use. | More Breathable & Comfortable: High-quality mesh materials, which is 11.3% more breathable, strengthens the ability of air circulation, dissipates heat, also reduces moisture inside to ensure smooth breathing. Meanwhile, its elasticity is 6.1% higher for wearing more comfortable. | Adjustable for Optimum Fit: Designed with adjustable hook and loop strap, which is friendly to adjust suitable size to fit most people for snugly fit. Enclosed AEB system helps keep the dust mask in place without slipping off from your head/face while relieve the pressure or pain in your nose and ears. Tips: Please refer to image 4 to take measurements before purchase. | Avoid Glasses Fogging: Enlarged one-way valves are 26.3% more efficient in exhausting of heat, water vapor, carbon dioxide, etc, which decrease humidity and keep filter performing high filtration. It works with flexible nose clip to seal the breathable face mask around the nose to prevent fogging. Make you get rid of the concerns of glasses fogging while working. | Reusable & Washable: The activated carbon filter is replaceable after time of usage, and the mesh face mask shell and valves can be detachable to wash by hand when get dirty.