Spenco Propel Carbon Insoles Size:M6-7.5/W7-8.5 a size 4 is a

a size 4 is a women’s size 5

the women's Hyperion 3 is designed to offer a fast

but has a better than-than-ever nitrogen-infused DNA Loft v3 foam midsole to give a shoe that feels lighter

snappy and provides sturdiness to help keep you sprinting on your toes

Spenco Propel Carbon Insoles Size:M6-7.5/W7-8.5 a size 4 is aSpenco Propel + Carbon Performance Insoles deliver explosiveness with each foot strike. Turn your everyday trainer into an elite race ready shoe with the Propel + Carbon insole. Designed by biomechanical experts, this insole features a carbon plate for explosiveness with each foot strike and INergy Foam for next level energy efficiency Carbon Plate provides forward propulsion and explosiveness with each foot strike Responsive INergy Foam cushioning