A BiPAP Nasal Mask is a type of mask used in conjunction with a Bi-Level Positive Airway Pressure (BiPAP) machine, which is a type of respiratory therapy equipment used to treat sleep apnea and other respiratory disorders. The BiPAP Nasal Mask covers the nose, delivering pressurized air to the patient through the nostrils. The mask is held in place with straps or headgear, and is designed to provide a comfortable and secure fit. The BiPAP Nasal Mask made by BESMED is a product of BESMED Health Business Corp., a company based in Taiwan that specializes in medical equipment and supplies. The specific features and specifications of this product may vary, so it is recommended to check with the manufacturer for detailed information.