Save on this Dial 8971 46 x 46 x 34 Cooler Cover (Down Draft). As the manufacturer explains it, Polyester fabric with double stitched seams, strong draw rope, and heavy-duty brass grommets. Compared to canvas, these covers are stronger, last longer, and won’t shrink. The water-resistant Polyurethane coating prevents water from entering the cooler while still allowing water vapor to escape, inhibiting moisture buildup inside the cooler. The cover is suitable for all seasons as it protects cooler from rain, snow, and UV.