The White Ground Cover is a 3.2 oz., woven, polypropylene fabric. Strong, heavy, and UV stabilized, this durable white fabric is resistant to tearing, puncturing, and weed penetration. Providing more than just tough fabric though, this ground cover is also permeable, allowing necessary water and nutrients to pass through and nourish your plants. Due to the reflective properties and thickness of the material, the White Ground Cover can be used as a frost blanket in the cold months. When placed over plants and shrubs, it will protect against light frost and cold temperatures by retaining the day's heat and blocking the night's wind.