The 3M Vortex Supplied Air Respirator (SAR) V-100 cooling assembly (3M-37018), when used with approved breathing tube and headgear, helps regulate the flow and temperature of supplied air system. Cools the air up to 50ºF. Includes the cooling tube, waist belt and holder. 3M supplied air respirators (SAR) require a source of clean breathing air such as plant air systems or bottled air. This clean, breathable air can be delivered to hoods, helmets, full facepieces, half facepieces and loose-fitting facepieces. Protect your health from harmful and lifetime debilitating isocyanates!