Replace your old running shoe's footbed with the Inov 8 Precision Footbed. Made with fast wicking, quick drying surface fabric and punched for breathability, this footbed is ideal for runners and serious athletes looking for a comfortable exercising platform. Offering a tighter fit at the heel and forefoot to minimize internal foot movement, the Precision Footbed is best for those with narrow feet. Regular sized feet will find this footbed useful for short training sessions, helping to eliminate excess slop and foot movement. In addition, this footbed is offered in a 3 or 6 millimeter height, allowing you to increase or decrease your shoe's internal volume.