SA X Shields® are an extra level of protection for the outdoors. The X Shields are designed with the nanofiber filtering membrane that protects against 99.9% of smog, emissions, viruses, bacteria, mold, pollen, dust and other dangerous particles. The filter is a concealed breathable membrane with soft open hole mesh layer to ensure maximum filtration function for optimal comfort. It also features an adjustable nose clip to ensure majority of inhaled air will go through the nanofiber membrane. For all your adventures you can be protected from the sun, wind, bugs, cold and dust with the X Shield®.