i dont think its for outdoors
mine was around $300ish (mopar) and it breaths ....rain would go right through it...
you want the moisture to rise and get away from your car...an exterior cover would hold the moisture..
they had a car on Chasing Classic Cars(i think) that was put outside under a tarp...10-15 years and you could put your fist through all the body panels...the car was trashed...value went from $40k to $500