The PolarRack™ XG incorporates smart energy and usability features. The rack's airflow capabilities include a door that lets air pass seamlessly through its perforation pattern, a bezel and rail configuration that prevents hot exhaust air from recirculating through the rack, and provisions for keeping the rear exhaust area clear. A clear top panel, an industry first, makes working inside the XG easier while reducing lighting needs. The PolarRack™ XG is the most energy conscience rack available. Working with the PolarRack™ XG is simple. The clear top panel helps illuminate the inside; giving better visibility and making work go faster. Cable management is simple and provided through innovative recessed troughs aft of the rear mounting rails. The rear trough areas have holes for the easy to use 1/4-turn cable velcro rings or D-rings. Plus, the cable management lances are built-in. Each rear area has two sets of power mounting tear drop holes, so power strips can be quickly mounted and are out of the way of exhaust paths. The PolarRack™ XG is offered in 42U and 45U models and is available in a 24" width and two depths, 37" and 42".