The M2 offers you advanced positioning support with its deep lateral and medial leg contours, while the tapered leg adductors give you pelvic stability. It is constructed with dual density foam, a molded foam base, and a QuadraGel pack to help regulate your body temperature and redistribute pressure for maximum comfort. It comes in two styles based on the support you need: Zero Elevation (same height from front to rear) and Anti-Thrust (with a mild “shelf” at the halfway point to minimize forward migration