Working: Infant, Graco Safeseat

Looking for an Infant Car Seat Cover for Graco Safeseat

I have a Graco Safeseat that is a little over 2 years old. We are expecting our 2nd child in November and would like to purchase a cover. Has anyone purchased one and how do they work? Are they safe to use? We had a lot of problems with our canopy popping off the side constantly...Would this solve that problem?