Ostrich Beach Umbrella Anchor/Shade Anchor Bag - Navy Blue Ballast keeps umbrella stable from the top - no chance of wiggling out Effective up to 30MPH+ winds Holds up to 50 pounds of sand Even if umbrella tips in very high winds, the Shade Anchor weighs it down to Doubles as a beach bag - transport your towel, water bottle, lotion, book, magazine, snacks and other beach gear