I highly recommend looking into Spindle Mattress. It's all latex and wool/cotton and sleeps a lot cooler than memory foam. You sort of put it together yourself

I highly recommend looking into Spindle Mattress. It's all latex and wool/cotton and sleeps a lot cooler than memory foam. You sort of put it together yourself (i.e. Put three thick sections of latex in a zippered cover) but this also also allows for a bit of adjustment (reorganize the layers which come in various finesses). The whole thing weighs a ton and ships in three separate boxes.