Covercraft flannel car covers are the softest 2 to 3 times thicker than other cotton and polycotton car covers, this flannel car cover is also soft-napped on the inside. The "cotton wool" type underside will protect the most delicate finish. Covercraft flannel car covers breathe so no moisture can be trapped under the car cover, and it is treated to be water repellent. The flannel fabric is resistant to mildew and rotting. Its a traditional woven fabric for the best indoor car cover protection. Covercraft Flannel provides a soft touch to pamper your paint finish. Designed primarily for indoor storage use, this flannel woven cover is constructed from a durable polycotton blend with a soft, napped underside finish.