My daughter and family came in for Thanksgiving and gave me a hand covering up my travel trailer. The box of the camper is 21’. The cover was just the right size and fit perfectly. My daughter climbed up on top and we handed the cover up to her. In a matter of minutes the job was done. I was satisfied with the quality of cover. The straps secured the cover on the ends and under the belly of the camper. The durability was tested that weekend with gusts of wind of 25 mph. It blew my wife’s rubbermaid storage building over, as well as, the umbrellas off our deck. The cover remained intact throughout the wind. For the price, the breathable cover is good quality and should last several seasons.