HEAVY DUTY CANVAS WHIRLY BIRD COVER. Keeps heated air in during the winter months. Helps to prevent rust and corrosion on cooler and cooler parts. Prolongs evaporative cooler life. Water repellant and mildew resistant Rugged brass grommets for securing split cover. Heavy duty sun-resistant cord. Downdrafts have one split corner for coolers with electrical disconnect boxes on cooler exterior. Covers are made larger in width, depth and height to allow for shrinkage and minor cooler size variations. Each cover individually poly bagged with cover size in bold 1" high numbers and references cooler models.