covers

Looks like I'll be driving my 88 911 to work a few times a week this year ...Oh Well. Problem is it can sit in the shade of a tree half the day and the other half exposed to the sun. I have a silver Porsche cover that is very difficult to put on and leaves a mess when taken off. Looking for the best cover for daily use and ease of covering as well as sun protection. Rain is not a problem but the residue left behind is certainly a consideration as well as bulk.The car is always garaged other than these particular days.
Any and all comments welcome.