Mars Hydro 70x70x160cm Grow tent for indoor Veg Flower Mars Hydro tent blocks all light from escaping. Nylon explosion-proof zippers & double stitching and double-channel port housing to protect against light leaks. A detachable mylar bottom shell and a 95% light-proof, tear-resistant, reflective mylar lining increase the intensity of the lamps and retain heat to keep the tent at the right temperature for plants, flowers, fruits and vegetables.