Nidecker Tracer Heel Lock Coiler black 2018/2019 FlowFIT - Combining Nidecker and Flow knowledge and experience with technologies like BOA ensures the best fit boots with the perfect balance of comfort, support and control. Boa M3 Coiler / Heel-Lock Quickfit - a new unique hybrid tightening system with Boa wheel and Quikfit laces. They simply lock the heel for greater control with less effort. Dual Density Insole - Double EVA foam anatomically