Superfeet: Readily recognized as the performance insole that fits over other existing insoles, the Synergizer Blue is the most versatile and easy-to-fit insole made by Superfeet. Add contoured insole comfort to your tightest shoes with the highly versatile Synergizer Blue Insole from Superfeet. Thinner than the green insole series, the Superfeet Synergizer Blue Insole works well with most running, biking and tennis shoes. The low contours also feel better on flat feet. This is the only insole available with a rear-foot control point that helps control over-pronation, giving you less stress on your muscles and joints. This stabilization continues at the mid-foot for enhanced control and less muscle fatigue.

J fits UK Childrens 11 - 13
A fits UK Childrens 13 - 2

Recommended for: Arch Pain, Weak Arches, Fallen Arches, Flat Feet, Heel Pain/Heel Spurs, Plantar Fasciitis, Pronation, Tarsal Tunnel Syndrome, Tired, Aching Feet.