All polypropylene covers are best suited for use in moderate climates for short term storage or indoors as a dust/storage cover.
Strap and buckle attachments prevent billowing in windy locations and allow for a custom look. Plenty of extra "give" to reach over a roof air conditioner, too. Reinforced, elasticized corners resist tears and snags.
PLEASE CAREFULLY MEASURE AS PER INSTRUCTIONS, AS ITEM IS NOT RETURNABLE: In order to ensure a proper fit, the manufacturer recommends that the trailer be measured from end to end, and to include the bumpers, spare tire and ladder in this length (for a pop up camper, you just need the 'box' length). However, do not include any propane tanks or hitches in this measurement, and do not rely on manufacturer's specifications. Covers are intended to fit loose. If the measurement is on the borderline between sizes, order the next larger size. Front and rear cinching system will take in the extra material. Covers are made to accommodate rooftop accessories, such as air conditioning units.
Good quality especially for the money