they get mould, were as the P.E is less likely to go mouldy if left rolled up, we can custom make to most sizes and also enclose them if you wish, if you check out my website then go to store, then click on awnings you will see a couple of pictures, the picture of the patrol is my car and that awning has been on there for about 10 years and is still almost like new, if you want to ask any questions, feel free to ring me, my work number is 07 3886 5466 cheers, Dave.