The Spark boot from O'Brien has a medium/soft flex pattern and power arch to offer comfort and support. Dual lace zones pinpoint adjustment all over your foot, while the integrated TPU ankle strap provides superior hold and pulls your foot into the heel pocket. The Spark wakeboard boot's ultralight liner combines light weight and comfort, and the 2.5° canted chassis eases stress on your legs. Traditional thick laces provide the most secure fit and durability, so the Spark boots won't loosen up while wakeboarding. Spark Boot sizes: S(4-7), M(6-9), L(8-11).