Portable Greenhouse 2 Velcro Roll-up Doors Large Walk-in Steel Heavy Duty Transparent PE Cover Gardening Plant Hot Outdoor HouseLarge Walk in Plant Greenhouse with 2 Velcro Roll up Doors Additional ventilate windows for free ail flow, you can regulate external airflow to keep the plants warm and provide better air circulation for the plants, and works as observation window. 2 Velcro roll up doors for easy access into the walk in structure of the greenhouse. Tough Half transparent CoverStable PE MaterialSturdy Steel Tube Supporting FrameUV ProtectionWaterproofFrame pipe