Breathable crib mattress?

Having trouble justifying $300 for a mini crib mattress by newton.

Anyone have other brand recommendations or can justify the price point of the Newtown mattress. My baby will be sleeping in a mini crib beside our bed and then moved to his nursery when he’s older.

I’m looking for a 100% breathable mattress. Would love to hear about your expirences/regrets/ must haves

Thanks in advance mamas!