... Shed 1.stand Membrane Structure 2.Permanent 3.perfect impact Triangle Sail Shade, Square Shed 1. Cost-effective: About 1/3 ... nature; stable and durable; waterproof, UV resistant, anti-rust and flame retardant; less maintenance, energy and cost saving, easy to move ... courts, exhibition and conventional centers, canopies and vehicle parkings, etc. Triangle Sail Shade, Square Shed