A while ago we stayed at an airbnb and I really loved the mattress I slept on. I didn't look underneath the sheets to see the company/brand but the owner said he got it from costco.
Basically (I am assuming it was foam) when you go on the mattress for a split second it holds you firmly and then goes down a bit slowly..
from the following list , which mattress would you reccomend for me ? (twin size)