Self-supporting shade sail with anodized aluminium poles, resistant to wear and sea salt. Structures can have a triangular, square, rectangular or hexagonal shape. The sail corners secured to the poles by means of return blocks, can be height-adjusted based on the customer’s needs to guarantee full protection depending on the sun’s height/path. The aluminium poles are anchored by means of 80° or 90° inclined support bases, made of hot galvanised steel and painted in grey. Ostro is a shade sail which has been developed to be installed with extreme ease and safety. Structure and shade sail are delive- red at the same time.