GARD'N Dome allows you to plant earlier and harvest later into the fall season. Cloche is 15" wide by 10" tall with a top vent that can be closed during the cold of the night. Open vent during the day to allow air flow. Flange around bottom of garden cloche with holes that can be used with earth staples to hold in place during wind. Garden Cloches are Made of plastic. Comes in sets of three.