Exceptional comfort under your feet; 20% thinner for a slim, versatile fit and feel. Superfeet RUN Comfort Thin insoles deliver maximum comfort in a thin profile while helping minimize foot fatigue. Responsive EVOLyte® carbon fiber cap and a thin layer of Aerospring Rebound comfort foam combine for a smooth and efficient energy transfer throughout your gait, from foot strike to toe-off. RUN LIGHT RUN SUPPORTED®. Made to fit in moderate to tight-fitting running and walking shoes, even some without removable sockliners. Trim to fit your shoe size.