KEY DETAILS 100% polyester. PVC backing. Water-repellent and resistant to fading and mildew. Hook at the bottom to keep it 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 Build Your Own - Mara Vista Outdoor Sectional (sold separately). Made in Mexico.