KEY DETAILS 100% polyester. PVC backing. Water-repellent and fade- and mildew-resistant. Hook at the bottom keeps the cover securely in place. Covers sit slightly above the ground to allow for air flow to ensure that moisture is not trapped under the covers. Phthalate-free. Accommodates West Elm's Porto Aluminum Outdoor 3-Piece L-Shaped Sectional (sold separately). Made in Mexico.