Red Wing teamed with Dr. Les Appel, inventor of Powerstep orthotic supports, to craft the RW Revolution. It is the ideal combination of long-life cushioning, foot control, and elasticity to offer more comfort than many other supports. It virtually eliminates strain and pain in arch, heel, ankles, knees, and lower back because it controls excessive inward rolling motion of your foot. It has a four-phase system that provides superior comfort and is THE sole to be reckoned with.