Our Haystack Covers are green in colour and come with a 3 year UV warranty. All seams on the covers are fully welded which prevents water leaking through stitch holes. Made from a woven polyethylene, all haystack covers have eyelets reinforced with PVC Vinyl spaced approximately one metre apart around the perimeter. This ensures the cover can be tied down tightly, thus minimising wind flap which is the main cause of damage to your cover.