Baby crib mattress?

Cheyenne • Momma of two angel babies 2/1/18 👼🏻 2/3/19 & a sweet girl 12/15/19 👶🏼

I got a crib from my parents (my brothers are 5 & 7) and want to replace the mattress. Which is best? I’m hoping not to spend too much because we’re both college students and don’t make much money