This isn't your average flimsy, one-season cover. It's made with especially hard, heavy-duty PVC material. It can be kept in a shed or garage and you can continue using it through many, many years in the garden. The ventilation slits along the top allow for healthy air and water exchanges. It keeps seedlings and young, tender plants safe from hungry critters and protect their soft leaves against damaging frosts. It's like having the option to create the perfect greenhouse environment right in your garden bed, whenever you need it. Also great for vegetable gardening—it's made with durable, food-safe plastic. Our GrowAway™ Row Covers come in a set of 4, each with the dimensions: L26"xW7"xH5".