Breathe easier & protect yourself w/our new athletic mask. Perfect for wearing while exercising, this stretchable & breathable mask is made of a comfortable material that is also hand washable & reusable. PE-03 can be used together with optional PE-12 PM 2.5 filter insert (sold separately) or other popular filters. For non-medical and non-surgical use. Features: Elastic earloops Ergonomic 3D construction helps prevent discomfort or chafing Breatherable wicking inner liner keeps sweat away