Finish through the tape 1st in the Nike Ja Fly 4, a sprint spike made to help you set personal records in everything from the 60 to 400 metres. Nike's lightest Sprint spike sports a revamped plate for enhanced stiffness and an updated upper for better breathability, so you can stay focused on doing your best.
UNISEX SIZING:
- Men’s 4 = Women’s 5.5
- Men’s 4.5 = Women’s 6
- Men’s 5 = Women’s 6.5
- Men’s 5.5 = Women’s 7
- Men’s 6 = Women’s 7.5
- Men’s 6.5 = Women’s 8
- Men’s 7 = Women’s 8.5
- Men’s 7.5 = Women’s 9
- Men’s 8 = Women’s 9.5
- Men’s 8.5 = Women’s 10
- Men’s 9 = Women’s 10.5
- Men’s 9.5 = Women’s 11
- Men’s 10 = Women’s 11.5
- Men’s 10.5 = Women’s 12
- Men’s 11 = Women’s 12.5
- Men’s 11.5 = Women’s 13
