What are the Ironman® Race insoles? The Ironman® Race insoles are race-ready footwear supports for that big day at Kona. Ultra-lightweight & featuring Spenco® TOTAL SUPPORT® Technology, the Ironman® Race is both exceptionally stable & hard wearing. ideal to be used during long training hours but lightweight enough to fit into race shoes, the Ironman® Race prevents overpronation & protects the heel strikers from the ricochet effect of hard road miles. With a one-year unconditional guarantee, the Ironman® Race will keep your stride in line no matter how hard you push yourself. How do they work? Featuring the Spenco 3-POD Modulation system which layers multi-density pods to soften the impact of ground force on the lower limb & leg, the Ironman® Race provides protection & support without compromising on weight. The Race is semi-flexible in the arch & contains deep heel cups to offer heel strike support & maintain optimum posture control. A low-friction top cloth with foot-cooling technology reduces blister causing friction as the antimicrobial fabric reduces bad odours. Sizes based on UK male & female shoe sizes.