Top products to help prevent SIDS (Sudden Infant Death Syndrome)?

Bronna

My husband and I are completely terrified and paranoid of SIDS. Last year my best friend’s brother lost his baby girl at 4 months old, so it really hit home for us.

I have read Owlet is recommended. So my question is, has anyone purchased this or plan to? Thoughts? I'm trying to get all my info before spending the $300!