Our short answer to this question is that for side sleepers mostly prefer our pillow-top model, while back and stomach sleepers (and those with back pain), prefer our original model.SIDE SLEEPERS:  Recommended Mattress: Pillow-Top Option Side Sleepers are the most common sleepers. Because of the curves in our hips and our shoulders, pressure relief becomes paramount. The Harvest Green Mattress has an advanced innerspring unit at its core, with three zones of posterized support. This unit is hyper-tuned to provide the very best in optimal support for both your hips and shoulders and assist in ensuring that your spine is properly aligned. Our full 5 inches of natural Dunlop latex pressure relief layers, which rest on top of the posturiezed support coils, provide gentle, uplifting support that side sleepers prefer.BACK SLEEPERS:  Recommended Mattress: Original Back sleepers are the second most common sleepers and have a slightly less "curvy" profile than side sleepers. This results in a diminished need for the additional cushioning of our Dunlop latex to ensure proper support and pressure relief. The result is a firmer sleeping surface that is preferred by the majority of back sleepers.STOMACH SLEEPERS:  Recommended Mattress: Original Consistent Stomach sleepers are the least common sleepers.  This is the flattest sleeping profile and requires the least amount of support in the hips and shoulder areas. Stomach Sleepers typically require a gentle, yet firm surface. Our original Harvest Green Mattress is the best-suited option for this sleeping position.CHILDREN:  Recommended Mattress: Original Children typically require a firmer surface for safety and to support their growing bodies. Our Harvest Green original mattress provides the ideal proper support, durability and natural materials that the adolescent stages require.​