Quictent 20'x10'x7' Portable Greenhouse Large Walk-in Green Garden Hot House 2 DOOR & 10 EXHAUST VENTS----2 double zippered front & back doors, give you 2 entrance at the greenhouse.(while product from other sellers only have 1 door).10 exhaust vents (8 on the upper part of sides, 2 on doors) for cross ventilation and venting on hot days while window screens also prevent insects, birds, squirrels, rabbits, raccoons from invading and harming plants. 2 LAYERS REINFORCEMENT MESH PE COVER----heavy duty 2 layers PE cover with reinforcement mesh molded into it. 100% waterproof, transparent cover can get 85% of the sunlight through, at the same time it can prevent ultraviolet ray, won't make plant burned. OVERLONG PE COVER DESIGN----You can put bricks or boards down to seal the bottom or just bury it in the soil. Greenhouse will be better sealed. Heat preservation and air tightness good in it, high humidity and high temperature are provided in winter. Gives seeds, seedlings, and young plants an early start. By the way, it will help increase stability of it. POWDER COATED STEEL----Heavy-duty powder coated steel framework.The poles are connected by convenient three-corner and four-corner joint, making the product stronger, while other sellers simply use screws. 10 BASES and 20 STAKES FOR STABILITY included, so that can increase the resistance ability of snow and wind. ONE YAER WARRANTY----Our greenhouses come from ISO 9001:2000 standard certified manufacturer. WARRANTY: 1. Lifetime Free Replacement for Connectors, Stakes, Bases. 2. One Year Free Warranty for Poles. 3. 6 Months Free Warranty for Covers. 4. Lifetime 50% OFF Parts Supply exceed normal 1 year warranty.