Cooling Vest Cooling Method Compressed Air Color Gray Features Can Provide Torso Cooling Of Up To 30 Degrees When Used With Bullard AC1000DC Cool Tube And Compressed Air Source. Can Be Used With A Bullard DC5040 Dual Cool Assembly To Provide Cooling Air Of Up To 30 Degrees To Both The Vest And A Niosh Approved Respirator Material Proban Treated Cotton Closure Type Hook-and-Loop Size 2XL Length 18 in Maximum Chest Size 50 in Minimum Chest Size 46 in