10' x 10' Outdoor Pergola Patio Gazebo Retractable Canopy Sun Shelter with Steel Frame, WhiteRETRACTABLE TOP: The polyester top with PA coating helps protect you from the harsh sun. The slide rail design allows the cloth to slide horizontally by pulling on a drawstring, so you decide how much shade you need throughout the day. STURDY CONSTRUCTION: This pergola with canopy has a steel frame, which is sturdy for every day, outdoor use. INCREASE STABILITY: Equipped with 8 ground nails into the grass for the hard floor, they can be inserted into