Hi, we have a snuzpod for our 4 mo baby which we usually put a sleepyhead in. But in this weather he gets too hot in his sleepyhead and wakes up. He hates the snuzpod matress as it's too thin but loves stretching out on our bed. Does anyone have any suggestions for a thicker, comfier replacement matress for the snuzpod? I hoping that will help us all get a better nights sleep!