I have a planecover window/cabin cover which is an excellent product with high craftsmanship...they even enclose a nifty wing-over attachment aid (a tennis ball with a slice in it) which really works! Since I have the HORTON stol kit the manufacturer had me call him from the hangar and take a few measurements to make sure we got the slots cut right...it came out perfect and was in my hands in a week...I also have the airplane-cover insulated cowl cover which, for the money, does the job...you can pay a little extra and get additional batting (which I didn't do because I'm hangared)...I'm sure others are nice too, these are the ones with which I have experience.