those are great (fantastic?) margins but i don't understand why they're not higher? there are so many memory foam mattresses on amazon that are exactly the same thing (maybe slightly shallower "soft foam" that run for e.g. ~300 for a queen that are themselves probably making great margins.
I have a Casper and I tend to sweat a lot at night so I was looking for a more premium mattress with better ventilation. When I've spent the night with "friends" who have cheaper foam mattresses, I often wake up drenched in sweat.
it has very little to do with mattress, hot air from your body tends to behave as psychics would dictate and will go through your blanket upwards, or whatever you sleep under. Most reasons for sweating is your AC blowing cold air at you at night when you sleep. When your head is cold the body raises temperature and hence you sweat under blanket.
Last thing to change would be another grand on new mattress.
