Jamison Mattress has an answer for those who sleep hot when they introduced the "Cool Gel Mattress" which includes the Caribbean, Mediterranean, and Pacifica.
Many Mattress companies offer Cool Gel, Cool Memory Foam, in an attempt to pull customers away from Tempur-Pedic (The leading manufacturer of Memory Foam). Unfortunately many Cool Gel innovations are for namesake only and offer Gel in the second or even third layer down in the mattress so the sleeper does not get the direct effect of Cooling.
Jamison Mattresses actually infuse their Gel throughout the entire Memory Foam Mattress so that it directly affects the sleeping surface. How this is done, with small pellet like Gel Beads infused throughout to allow for optimal air flow throughout the mattress and thus keeping the mattress and sleeper cooler. Air Flow is the #1 and Best way to cool a Mattress and Jamison capitalize on this fact with the Caribbean, Mediterranean, and Pacifica Cool Gel Memory Foam.