ltra-soft touch on face Long lasting Hepa filter Anti-fog Lint-free thermal bonded non-woven fabric applied to inner layer 3D ergonomic design to face Comfortable ear loops HEPA Filter - To better trap bacteria and viruses, the mask is using the HEPA filter. HEPA stands for High-Efficiency Particulate Air, is a designation used to describe filters that are able to trap 99.97% of particles that are 0.3 microns. These particles can (and do) include bacteria and viruses. Easy to Breath - The supreme 4-layer structure masks capture fine particles in the air to protect your health while giving you the best breathing experience with it. The HEPA filter is one of the most breathable materials out there. It was about as breathable as a cotton t-shirt and much better than a surgical mask. Premium Fabrics – Lint-free thermal bonded non-woven fabric applied to the inner layer. Other layers are using Spun bond SSS nonwoven fabric. This fabric exhibits flawless performance and has the right balance of softness and strength. It has features like moisture-proof, light-weight, breathable. It is non-toxic and non-irritating, so you won’t smell anything when wearing our mask. It is also easy to decompose and environmentally friendly. Ultra-soft Touch – GREEN ICX’s face masks are offering you the ultra-soft touch on the skin. With the same fabric used on baby products, our masks are anti- itchy and won’t cause skin problems with even sensitive skin. Elastic Round Ear Loops – With the high-quality 3D round shape 3mm elastic ear loops, our face mask eliminates the pressure on ears to maximize the comfort of wearing. Reinforced Seams – Beautiful and strong seams allow secured a long time wearing and resist to broken. Steel Nose Strip – Soft to bent to fit your face shape to provide better protection and avoid fog on your glasses. Clean Storage Packing - Masks are sealed in a re-sealable bag. After each use, simply seal the bag to avoid exposure to unused masks