The Nitro 7' Diamond Umbrella is a modern umbrella design with an asymmetrical canopy design. The Nitro 7' Diamond Umbrella is created with fiberglass ribs for durability and is covered in a host of marine grade fabrics. To open the umbrella simply push up the center hub and inject the pin into the pole to secure. To lower, push up slightly on the hub, pull out the pin and slowly lower the hub down the one-piece aluminum pole. When umbrellas are not in use or in breezy conditions Texacraft recommends lowering the umbrella for safety purposes.