Shade sail

They are usually provided above public gathering places such as seating areas and playgrounds in countries where strong sun radiation makes prolonged stays in the open sun unpleasant or dangerous due to sunburn and skin cancer risk.

The Colosseum in Rome was shaded with large canvas "sails" pulled into place by Roman sailors.

[2] Successful shade sail design uses the inherent "stretch" of the knitted fabric to create three-dimensional shapes.

For sails that are used on an occasional basis, the pulley system is more practical since it can be set up and taken down in a couple of minutes.

For domestic applications of shade sails it is recommended to install them with a quick release "snap hook" at each corner.

It is important to ensure that the mounting points are substantial and secure both to be able to accept the required initial tension and to absorb the loads created by wind gusts hitting the sail.