I used a Covercraft breathable cover. Tons of condensation and it completely ruined my paintwork on the car it was on. It made the whole car sweat, inside and out.
If it is cover you need Covercraft make a few covers but if it for outside when the weather is wet most of the time you neen a fully waterprofed cover ,the nane is The Monsoon . Used one of these for three years of trouble free use . I use old bed linen over the car to start with after a good clean and wax polish ,I was lucky that a i had set of thermal sheets left spare after we updated to fleece ,.By the way no need for leci blankets wth these .
I lie the thermal sheets on the car and then tie down to the handles .The covers come fitted for your car along with 4 breather holes covered with flaps also webbing straps to secure them under the car. I also have three bunggie ropes lined with polly pipe to take the pressure off the bodywork to hold it down when we have the normal wind problems . I looked in after a bad frost to find it nice and dry no condensation in sight . Also check the cover you choose as wing mirror pockets and that the cover goes down to cover the wheels ... ATTACH=full]89285[/ATTACH]