Perfect idea for the back patio!
Adjust turnbuckle to tighten shade sail
Shade sail - great way to give shade. Can be taken down when it's not needed. Loads of colour choices.
Coolashade Shade Sail Connectors
Cover Your Outdoor Space With Shade Sails
Coolaroo Shade Sail: Charcoal shade sail 5.4m Square
Shade Sails by All Shade Solutions – Perfect To Create Shade in Your Courtyard | DigsDigs
shade sails for patios | Shade Sails
Shade Sails for your outdoor living areas @Kitty Terrell , this is what you need for by the pool!