By combining 3M’s innovative filtration science with O2’s elegant design, we’ve created the most discreet and effective solution to protect you from breathing in airborne pollution, allergens, and more. Once you have determined the right size for you (we recommend the Trial Sizing Pack to start-off which includes 4 sizes), the lightweight and discreet filter will contour the inside of your nose. Made from soft, medical-grade Thermoplastic Elastomer (TPE), the O2 Nose Filters are comfortable to wear and are latex-free. Great for everyday use in industrial areas, public transportation, and outdoors. All packages include a small carrying case.