CyclingDust Mask -FuturePPE sports mask are designed with unique breath system for better personal protection. Outer mesh mask shell enhance breathing performance, plus inner replaceable filter, which can blocks pollution like: exhaust fume, smog, pollen, dust etc.Five- Layer Filters -Breathing face mask include one filter, which has 5 layers providing professional filtration. The first layer blocks large particles, the second activated carbon filter layer filter benzene, car exhaust. The third and fourth layer filter 0.03-0.3 microns of dust and particles. The fifth non-woven layer comfortable and breathable.Double Strapping System -This reusable running mask is also designed well because it uses both a loop strappingbehind the head, so there is no need to consistently readjust the mask or have it slip. The durable design ensure a comfortable and firm fit and prevents dust and other contaminants from penetrating the mask.Large Variety of Uses-FuturePPE Sports Mask can be used for variety of uses such as:from mowing to running, cycling, hiking, skiing and other outdoor activities in extremely cold climates (if you have sensitivities to the cold when exercising). It works in filtering allergenic pollen. Besides, If you live in an area prone to forest fires, this dust mask can protect you from the smoke and ash. Lightweight design allows for more comfortable use.Reduce Overheating & Fogging -Dual one-way Breathing valves allow exhaustion of heat and carbon dioxide easily, provide smooth breathing, prevent fogging and overheating exceptionally well. Designed with neoprene structure, makes it well-ventilated, breathable and quick drying. Useful for those who need to wear the mask for hours at a time. Please replace the filter every 8-15 hours if the mask is used extensively in heavy dusty operations, such as grain bins, construction/demolition, et.c