Miller® Aircore™ Harnesses, CSA Certified, Class ADL, 400 lbs. Cap.Designed with breathable, open core padding technology that provides optimal air flow, while reducing heat and moisture entrapment, keeping a worker drier and cooler Patented Miller DuraFlex stretchable webbing provides greater flexibility and increased comfort Easy adjustment with cam buckles on shoulder straps Contoured ergonomic padding design minimizes contact around a worker's neck, lower back, and inner thighs to reduce chaffing and irritation