Secret Jardin Dark Room 300 v4.0 10' x 10' x 7' Indoor Grow TentDescription DARK ROOM v3. 0 THE DARK ROOM: MORE LIGHT PROOF, MORE EQUIPPED, MORE ROBUST! Specially lined with 95% reflective hammered effect mylar fabric (210D), to increase light intensity and improve light distribution. Light proof, waterproof and pre equipped for extraction and ventilation, the tents come with equipment bars to support lamps, and carbon filters. A product lines available in different sizes from the DR60 (60x60x170 cm) to the DR300