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For Basketball Only. Ground
Reaction Force (GRF) is the biomechanical term for the force exerted by
the ground on the sole of the foot during weight-bearing activities.
Based on our best-selling TOTAL SUPPORT® Replacement Insoles, the
Spenco® GRF Replacement Insole is designed to modulate the magnitude and
direction of GRF to enhance the efficiency of vertical leaps and reduce
the risk of ankle sprains. They also provide a unique combination of
arch support, forefoot cushioning, and energy return. Semi-Rigid Arch Support Designed for Basketball
Based on our best-selling TOTAL SUPPORT® Replacement Insole,
Spenco® GRF Insole for basketball incorporates unique design features to
reduce impact forces and return energy; provide support and stability;
enhance vertical leaps, and reduce the risk of ankle sprains.
Directions: Replace existing insoles. Trim if necessary. Hand wash, air dry.
SIZING
For half sizes order the next size down.
For example, if you normally wear size 10.5, order a size 10.
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