Pack of 2 Plant Protection Non-Weave Fabric Sheet Cover for Winter Frost Cold Garden Greenhouse Bags 23"x31" Floating row cover provides frost, wind and organic insect control. Row cover traps heat and moisture to produce bigger, better and earlier crop yields. Non-woven fabric cover, ultra-light and resistant to exposure to the environment; it allows light and air to pass through and is reusable They are also used by commercial growers for plant protection. Easy to store and can be used season after season. Size: 23"x31"