Made of top quality 600D polyester canvas complex with waterproof backing. Guaranteed to fit market umbrella up to 10' DIA (Round) or 7' L (Square)..ULTCOVER provides 3 years warranty and guarantees to be 100% waterproof with double stitching seams taped. Tough enough to keep rain, hail, snow, dust away..Heavy duty plastic clips & straps in the middle of the umbrella cover, allows adjustment for a tight and easier fit. Elastic hem cord with adjustable toggle and hook & loop for a tight custom fit, especially during high winds and severe weather..Every package comes with one collapsible fiberglass pole, Convenient to lift the umbrella cover up & off. Zipper closure for easy take on and removal..100% coverage design avoids the exposure of the sun, makes your umbrella always look like new.