An Increased Harvest, Sooner! The original floating row cover, made from spunbonded polyester. Holds in warmth to provide early and increased yields, great for pest control and to extend your harvest into the chilly fall weather. No wire support hoops necessary. So light it can be placed directly on the plants without damaging them. Rugged breathable material allows light and water through and won't overheat plants like plastics can. Will not rot, shrink, or sag.