Patio high-back chairs are an investment and like any investment, they need to be protected. By using 370 g.S.M. (grams per square meter) heavy-weight polyester material with PVC backing, you will get long-lasting protection for your high-back patio chair. Our waterproof fabric with interior binding keeps your high back patio chair dry during any type of weather. The corners of the cover feature durable straps with quick-connect buckles to secure your cover around the legs of the chair that will keep it in place during high wind.