The 8x6 Greenhouse in a box from ShelterLogic has a high grade steel frame. Ready to build out of the box with roll up side vents. It has a triple layer heat bonded ripstop translucent cover which is waterproof and UV treated inside and out which provides enhanced illumination designed specifically for plant growth and protection. 35mm high-grade steel frame with premium powder coat finish resists chipping, peeling and corrosion Patent-pending ShelterLock 3x steel stabilizers ensure rock solid stability and delivers a stable, more durable shelter EasyFlow side panels provide airflow and temperature control Bungee fasteners hold sides open, hook and loop fastener strips keep sides down Ratchet tight cover tensioning ensures drum tight cover and door panel connection to .