The Craftsman(R) cover protects your tractor against rain, dirt, bird droppings and tree sap. It is made of weather protective fabric that includes water-resistant and repellent finishes. It fits riding mower with decks up to 62''. The air vent is made to let the air circulate in order to prevent ballooning in winds. The elastic shock cord in bottom hem for a quick, tight fit. This product is factory warranted for workmanship and materials for one year after purchase.