This is the "AirFit F20" CPAP mask from ResMed. ・Size: Medium ・Condition: Brand new, unused (unopened) ・General medical device ・Ventilator mask As it has been stored at home, the outer bag may have some minor scuffs, but the contents are unused. Recommended for those who use CPAP or are looking for a replacement or spare. *As this is a medical device, please only purchase if you understand this. *Returns and exchanges are not accepted. Immediate purchase is OK.