NIKE VaporMax Flyknit 2 in Thunder Grey Women’s Size 6.5 Gently Used Flaw: the end cap on one shoelace came off (see picture) The Flyknit-fashioned upper features the signature grey hue all throughout, which is then offset by the black heel counter, along with a generous helping of deep blue comprising the sole unit, as well as the hits of “Hot Punch” landing on the heel pull tab and sandwiched between the midsole and back-end upper.