Size

EU 40=UK 5=USA 5.5 EU 40.5=UK 5.5=USA 6 EU 41=UK 6=USA 6.5 EU 41.5=UK 6.5=USA 7 EU 42=UK 7=USA 7.5 EU 42.5=UK 7.5=USA 8 EU 43=UK 8=USA 8.5 EU 43.5=UK 8.5=USA 9 EU 44=UK 9=USA 9.5 EU 44.5=UK 9.5=USA 10 EU 45=UK 10=USA 10.5 EU 45.5=UK 10.5=USA 11 EU 46=UK 11=USA 11.5 EU 46.5=UK 11.5=USA 12 EU 47=UK 12= USA 12.5 EU 47.5=UK 12.5=USA 13

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The K-Formula is Sparco's newest flagship kart boot, and it was created to offer unmatched levels of comfort. The ultra-lightweight, perforated calfskin used in the boots' construction provides optimum breathability while still retaining a soft, comfortable fit.

• Elastic back insert
• Silkscreen prints
• Thin rubber racing sole
• Comfort insole
• Closing system with cables and rotor to speed up shoe opening and closing
• Lightweight breathable lining