Need advice

Hi ladies! So 1st off my younger sister died of SIDS so my girls risks goes up. I’m looking for bedding for my twin girls and I want to be cautious. What did y’all do for the bumper? Is it really necessary? I looked at the mesh but I don’t see how that would help if they hit their head on the rails. Please help!

Update: I’ve done years of research because of my sister. Which left me as the only child and it sucked. I raised awareness and stuff all through college and I know more about SIDS than I ever planned to, but in that research I knew the bedding restrictions but I did not know the issues with the mesh and could not find it anywhere. Even though in recent years SIDS has been discovered as a neurological defect with the nerves in their brain, I’m still paranoid. I’ve had 4 miscarriages, an ectopic, and ovarian cancer and now we are expecting twin girls. I’m excited but anxious too because I’ve lost so many already and I saw how it affected my mom. She died when I was 13 due to medical issues brought on by depression. I am so grateful for your help ladies! I’m paranoid already bc the twins risk goes up because of my family history with it. My uncle (mother’s brother) did around the same age as my sister and it was never found as to why he died, but after years of research and visiting my sisters grave and his, I put 2 & 2 together. So say a prayer for us as we get ready for their arrival and I try to make things as safe as I can.

Also I have looked into the owlet sock but because I’m having twins, I cannot spare the $600.