Each Arctic Armor pool cover is made with premium UV inhibited polypropylene mesh that is super strong and long lasting. Both their lightweight mesh and solid safety pool covers are easy to remove and allows snow and water to drain through, effectively screening out all but the finest dirt and debris. The pool covers with a spring-loaded anchor system that secures your pool from unwanted intruders. Arctic Armor’s pool covers meets or exceeds all federal safety pool cover performance standards including ASTM 1346-91 and they can be made to fit any shape pool.