snaps. Just in case you want 'em...

I made a car seat cover for a sweet lady a while ago, and she requested "wind control", so we added snaps!  nice.  Now the blanket fits the car seat nice and snug if it needs to.

Here's a weak diagram of where I placed the snaps (M = male side of snap, F = Female side of snap). First I attached the cover to the carseat and then pinned it where I thought the snaps should go for a snug fit. Then I marked where the pins were and followed the instructions on the package of snaps I bought from Joann's to attach them to the blanket. 

It's a fuzzy picture, sorry.  Which is why I've needed a new camera.  Which is a whole other post.

car seat cover tutorial