RAINPROOF DESIGN 2 kinds of protective measures,the roof rack bag made by the 500D folder grid after high-frequency pressing from refining into a dense and compact surface, coupled with invisible zipper well-designed magic stickers,protecting your luggage against rain, grit, snow, wind and sun.OUTDOOR PARTNER -30 ~ 50 temperature range, add a protection for your adventure trip.Roof storage bag is designed to fit all roof racks with attachment capabilities on all four sides, if you have a car with a roof frame, this bag will be your trips best companionMORE SOLID 8 X 30cm tie straps, hitched to the rack railings, not only can withstand the weight of 100 kg, but also to prevent baggage bag from inclining while driving, solid and reliableINCREASES SPACE 15 cubic feet and 38'' x 38'' x 18" large capacity rooftop bag, you can regulate your baggage, make more space for your family and friends, enjoy a comfortable and pleasant travelAFTER-SALE WARRANTY AUPERTO is committed to provide six months guarantee service, have any questions,feel free to contact the seller customer service, 100% service and 100% guarantee.