I have used Stormforce on various cars / vans over the years and they are well made.
They do have a life-span of maybe 4-5 years when used outdoors but that works out to be very good VFM - especially with a good £saving£ on new.
I have used one inside the garage too on my ex Tuscan and it breathed well too.
I would be buying this if I had not treated myself to a very nice Classic Additions stretchy/fleecy cover earlier this year.
GLWTS.