2 unisex sizes & adjustable ear loops for a perfect fit. Integrated neck strap, to carry the mask when not being worn and keep it from getting dirty in your bag. Reversible & washable design, to give you colour options depending on your mood. Highly breathable inner and outer layer made of lightweight. Reusable & sanitizable American made 95% effective MERV 16 filter. Ethically and sustainably produced in New York. Although we have done the research and due diligence to source quality filters that we believe are better than almost all masks on the market, except a certified N95 respirator, we are a fashion brand and not a medical supply company. As such, our masks are classified as non-medical masks and should not be used for the diagnosis of a disease or other conditions or in the cure, mitigation, treatment, or prevention of disease and do not meet the definition of a medical device.