Boer Fitness Training Crossfit Facemask with filter. Please be sure of your purchase, we cannot accept returns. Very close fit and designed for the active wearer. Adjustable nose piece, Velcro fastener, long lasting and durable. This design has dual exhausts ports for easy breathing. Primarily used by athletes and designed for rigorous training. Has also been adopted by law enforcement, first responders, and professions that require daily interaction with the general public. This is NOT for the medical/hospital environment but is safe to use there periodically. This offers greater security and fit than the flimsy paper masks with the ear strings or stretch face bandanas. Comes in a resealable thick plastic pouch thats watertight. This facemask can be used in the rain, wind and any weather condition. Very affordable and can be dissassembled for cleaning. Advisable to purchase more than one, so when one is being GENTLY WASHED AND ALLOWED TO AIR DRY, the second can be worn in the meantime.