The Rion Green Giant greenhouse features Dual wall 6mm polycarbonate panels that create superb insulation and protection for your plants and flowers. Designed for year-round use, the Green Giant will provide you with the ideal gardening environment regardless of the season. Double doors allow for easy entry and exit and provide excellent ventilation when opened. The rich hunter green frame is thick and sturdy. The Dutch barn roof design is both elegant and functional with 8 ft. of headroom and 6 ft. 9 in. doors. The Rion Greenhouses can withstand winds of up to 80 mph and have been tested to support a 1,100 lb. snow load. All this quality plus the ability to expand your greenhouse makes the Rion Green Giant perfect for your gardening needs.