When storing the mattress, it's best to lay it flat rather than upright. If it must be upright, we recommend laying it flat against a wall so it doesn't bend or fold over. Our Eco line of mattresses should always be stored flat and never upright.
It's ideal that the mattress is in a temperature-controlled setting, but latex can survive below-freezing temperatures and extremely hot and dry temperatures (avoid wet and humid conditions). If latex gets cold, it may take a bit longer to regain its original shape — but in the long term, it will be fine. If the mattress is stored for an extended period (more than a few weeks), we recommend using a breathable case. If stored for a shorter period (i.e., during moving), a thick poly bag like this one will protect your mattress.