Sun Hut® Fortress® are the newest line of premium grow tents from Sunlight Supply®. These tents deliver a new innovative design along with unique product features, enhancing your indoor greenhouse experience. Fortress have exceptional quality with superior durability. Constructed from 1680D light tight material with a highly reflective interior surface. The material is up to 9 times thicker than popular industry tents! The frames are extremely robust and include heavy duty reinforced poly propylene connectors that fit securely into our galvanized steel poles. Fortress® tents feature 22 mm poles on most models. The smaller 45, 85 & 90 have 19 mm poles.* Rubberized waterproof floor helps to contain water spills from escaping outside of the tent. Includes a removable reflective floor liner, ports for ventilation and cords, two micro-mesh screened ventilation windows and many more great features. Note: model numbers identify the approximate cubic feet.