Hot Sale! 48 Overall Dimensions:48 Cover Material:600D Polyester(exterior)+100% Reflective Tear-Proof Silver Mylar(interior),Water-Proof,Non-Toxic Heavy Duty Durable Zippers, Large Zipper Doors, Double Layer Duct Vent with Drawstring,Mesh Air Intake Vent with Velcro 4 Assembles in minutes without tools,Suitable for all growing systems; compatible with all lights