Nidecker Tracer Shoes Heel Lock Coiler spacegrey 2019/20 Specifications FlowFIT - Combining Nidecker and Flow knowledge and experience with technologies like BOA guarantees the best fit boots with a perfect balance of comfort, support and control Boa H3 Coiler / Heel-Lock Quickfit with Boa wheel and Quikfit laces, simply lock the heel for greater control with less effort 3D-molded Single-Density - anatomically shaped comfort