6'x20' A breathable floating woven polyester material, lies over your beds to extend the growing season, acting as a mini-greenhouse that allows air and water in. Resists frost and will not overheat or crush your seedlings. Also protects against root maggots, flea beetles, leaf miners, carrot rust flies, birds and other pests. Also use Reemay to protect tender crops at the end of the season. Will last three seasons if kept out of the weather during the summer and winter.