Lightweight, flexible Thermoflex backplate for greater comfort and flexibility EZ-Flo regulator reduces inhalation and exhalation resistance for reduced user fatigue Pneumatics are easily removed with a Scott “quarter-turn”—no tools required—for ease of maintenance and turn-around Adjustable, padded shoulder straps and waistband with quick-release buckle for comfort and ease of donning and doffing Shoulder mounted photoluminescent gauge with whistle end-of-service alarm for ease of use Cylinder: 2216 psi Aluminum, 30 min.