Crib mattress help/advice? 🌙

Kelsey • 22 and have a beautiful daughter 🤱🏻💜

Hi mamas, I need some help and advice picking out a mattress for a newborn? my MIL was at Sears for a closing sale and says she can choose between "posturpedic" and "starscape"... does anyone know these and have reviews, or have any advice when choosing a mattress? Thank you so much!