Sun Hut? Blackout? grow tents are the newest line of Pro Grade grow tents. The Blackout? tent line offers the most complete and diverse selection of tent sizes and configurations available. These tents are constructed from 210D light tight material with a highly reflective interior surface. The frame of the tent uses heavy duty galvanized steel poles and fit securely into our reinforced polypropylene connectors. Easy and quick to assemble tents will have you growing in no time. Door access locations depends on the size of tent, which can be found on the front, side and rear of the tents. Sun Hut? Blackout? Models 70 and higher have multiple door access locations. Other features include clear viewing windows, removable reflective mylar floor liner, adjustable dual sock ports for ventilation and power cords and Micro-mesh ventilation windows. Note: model numbers identify the approximate cubic feet.