The 4 Pc. Sofa Patio Cover Set (HL-CVR-CL-4SS) by Harmonia Living is perfect for keeping your patio furniture looking its best throughout the year. Constructed from weatherproof vinyl, this cover is designed to keep sunlight, moisture and debris off of your furniture when it is not in use. This reduces the toll that outdoor exposure takes on your patio furniture, making it easier to clean and maintain. The cover's vents allow moisture to escape, preventing the build-up of mildew. The cover also has string ties that keep it firmly in place. For hassle-free furniture protection, nothing beats these outdoor furniture covers!