What are the Spenco Q Factor Insoles? The Spenco Q Factor is a specially designed insole for support & stabilisation of the foot. By controlling supination & supporting the arch, the Spenco For Her Insole is an ideal sports insole for use in athletics & indoor sports. How do they work? Featuring a 3-pod cushioning system to absorb shock & prevent over pronation, the Q Factor Insole have been specifically designed with the female foot in mind. A deep heel cup & high arch support allows the foot optimum support when encased within the insole. A low friction Silpure antimicrobial top cloth prevents blisters & bad odour from over use. This makes the Spenco Q Factor a hygienic multi-sport insole. Simply remove the existing insole of the chosen footwear & replace with the Q Factor (product may need trimming to best fit) & wash only by hand in warm water. The Spenco Q Factor comes with an unconditional one year guarantee. Size guide UK 2/3 US 3/4 EU 32/34 UK 4/5 US 5/6 EU 36/38 UK 5/6 US 7/8 EU 38/40 UK 7/8 US 9/10 EU 40/42 UK 9/10 US 11/12 EU 42/44 Shoe Size Conversion Chart