The Single Post Waterproof Umbrella is available in a square or hexagon shape. Our square outdoor umbrella may be purchased in a 13-foot or 16-foot size. The hexagon umbrella may be purchased in a 16-foot or 18-foot size. All umbrellas are available in your choice of an 8-foot or 10-foot entry eave height. These commercial-grade umbrellas come with our Glide Elbow™ fabric removal attachment, which makes it faster to remove the fabric in the case of bad weather; this is especially convenient for areas that are frequented with damaging storms, snow, or high winds. What's more, this umbrella is waterproof! It features our RainGuard Waterproof Fabric, which propels water and keeps the space underneath the umbrella dry.