With the OSO, you get the option of firm or soft in the same bed. This allows you to uniquely cater to your particular pressure points. Too soft? Too firm? Just rotate (not flip) the bed 180 degrees for a different option and a better night of sleep.
Your shoulders are pickier about support than your knees. Your hips are more sensitive to firmness than your feet. We design the OSO mattress with the idea of focusing support on the areas you need it most: your shoulders, lower back, and hips.