Pillows for Lucas...?

My son has those border pillows that go all around the perimeter of his crib and he likes to sleep on them. We can put him in the middle of the bed, but he always ends up sleeping on them. His airways are always clear of course, and he looks like he's super comfy that way. The pillows are not firm at all, so there's a lot of give to them and his head sinks in nicely. Is this okay for him?? He always ends up there now a days. Should we take them out?

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    About Cassie
    Current: Tempe, Arizona
    Birth: March 10
    On Moms.com since: Dec 30, 2013
    Mommy of 1 and step-mommy of 1!!!! Abs is my step baby and I love her so much and Luke is my boy and the most amazing little man. I love my babies beyond words and I've never been happier! I work for an event company called Game Truck!