Material: PVC,Nylon and tube Kayak sail diameter: 108cm Folded diameter: 40cm Weight: 350g Foldable YES Suitable for all kinds of sit on top kayak   Quick in use: Compact design, easy to set up and deploy quickly. Hold the clips to keep kayak go forward, and just lay it down to stop. Perfect protection: Huge sail with 108 cm diameter, can effectively weaken ultraviolet radiation and protect you from hot sun when sailing Easy to store: Up small (39 cm) folding design, lightweight and portable to store when not in use