Natural Latex Mattress - would love for it to work

Wanted this for natural materials, no chemicals, and firmness without being cloying like the posturepedic mattresses we tried in store (feeling like they sucked us in and we couldn't get out of the indent). Great for two, as it does not transfer movement of partner rolling around in his sleep, which used to make me almost seasick. Trouble is: I love it. Hubby finds it too hot at times, esp. in summer. What makes us go back for the warranty now after less than 3 years is that the mattress top surface bunches up into long sausages across in two places and won't let you smooth it down. We're not sure why. Inspector was there and confirmed this. We'll see how the company and store will/can resolve this. Not looking forward to searching for a mattress again! If Nature's Rest company could resolve this directly and perhaps supply hubby w/a cooler top option (we bought the recommended 100 Dollar mattress pad at the time), we'd be very happy as far as the overall structure and the faith that it's made from largely natural materials.