6' x 3' x 3' Portable Greenhouse, Garden Hot House with Two PE/PVC Covers, Steel Frame and 2 Roll Up Windows, GreenDouble Protection: The 140 GSM PE cover on this tent greenhouse maintains high humidity levels and protects plants from UV scorching while letting 85% of nourishing sunlight through. You can use one cover during the warmer months and add the second one once it starts getting colder to protect your plants. Extend The Growing Season: Our mini greenhouse creates an isolated space to protects plants from fluctuating temperatures. Extend the growing season