ArcOne AP-WBT-01 Waist Belt is part of ArcOne's AirPlus Air Purifying Respirator System. The system is a motorized, battery operated system that blows a constant supply of fresh, filtered air over the face. It creates a protective pressure inside the respirator head top keeping away harmful gases, vapors and particulates. The AirPlus system can run up to 17 hours, has 8 Airflow settings, an audible alarm and vibration alert to let you know when airflow is low or filter is clogged, battery that recharges in 5-7 hours, charger with LED indicators, audible and visual alarms when battery is low, comes with a flexible breathing tube with quick disconnect and flame retardant cover, as well as a single HEPA filter, Airduct headgear assembly, washable face seal and adjustable waist belt. The waist belt is ergonomic and comfortable.