Breathable crib mattress?!

Bridget • Wifey/Boymom x 2/Nurse
Been reading about the SecureBeginnings or SafeSleep breathable mattresses. Does anyone have one or buying one? They also look like a breeze to clean! As a baby I slept propped on my side or tummy....and my friend's baby could turn herself over at a very young age. 
Worth it to buy? Also looking into breathable crib bumpers? Thanks!