The Coverking RVCA30P62 Universal Fit RV Cover Class A Length 28 ft. to 30 ft.-(Presidium, Grey) is an outstanding value and provides amazing protection for your RV. Made from 600 denier polyester, the cover is tougher and thicker than the average universal RV cover. The 600 number refers to a type of polyester thread count in one-inch intervals (the higher the thread count, the tougher it is). All seams use an advanced double-stitched method so covers remain water-resistant even at the closure. The cover is breathable to ensure moisture is not trapped within. Ventilated air-vents are aligned around the top edge to reduce wind friction and prevent moisture buildup.The cover comes with a built-in zippered-door-flap for easy in and out access. To keep the RV cover in place, adjustable buckles are integrated on opposite ends. PRODUCT DETAILS: Available in to fit any Class A RV. All-season protection against snow, rain, sleet and hail. 600 denier .polyester material for advanced durability. Double-stitched seams to prevent tearing. Breathable material with top curtain air-vents to prevent moisture buildup and mildew. Easy access zippered-door-flap. Adjustable quick release buckles to hold the cover in place. Lock grommets available around the bottom skirt of the cover. Size: Class A - 28 - 30 ft.