The speed 600 ignite v2 is now even faster then before with the new and improved upper the new engineered mesh creates an improved weight for a lighter look and feelkeeping the existing tooling that you are used to we got the three punch combination of new technologies that will propel you ahead of your competition upper everfit upper and heel lockdown technology that secures the midfoot and heel without inhibiting the foots natural movement and prevents the tongue from moving new el