Innovative Design with Your Baby Mind! Our innovative Pod Dual Position & Twin Crib Mattress insures your babies' proper cranial development. With 2 contoured pod areas for your twins heads and bodies, this mattress will provide maximum comfort and support without causing external pressure on their heads. Great for use with one baby as well, you can reposition baby each night to change his/her sleeping position. And once your baby/babies learns to roll over, you can just flip over the mattress to the smooth side and use it until baby outgrows his/her crib.