The most water-resistant and UV-resistant covers on the market, our Ultima collection of Outdoor Chair Covers are lightweight and flexible, but won't compromise easily under harsh weather elements. Made from durable 300 denier solution-dyed polyester fabric, meaning the yarns are dyed prior to weaving to achieve optimal colorfastness overtime. Ultima chair covers comes with a plethora of smart features like a 360 degree elastic hem with drawcord locking system, as well as four buckle straps in opposing corners to provide a snug fit and look. A discreet mesh vent and flap have also been incorporated to help facilitate airflow needed to block mold & mildew and ensure maximum breathability. All Covermates Ultima chair covers come backed by our seven-year best-in-class warranty so you can purchase with confidence.