Designed with runners in mind, Dash 450 delivers a perfect no-bounce fit with high performance illumination. The updated lens design improves optics for a focused, bright beam to light the path ahead. A rear red light and reflective band printing provide runner visibility from all directions for added safety. Award-winning 3D Slimfit construction and a front measuring only 10mm thick makes this running headlamp so comfortable you forget you’re wearing it. BioLite Shop Exclusive: Backed by the HolyFit Guarantee. Use it for 30 days and if you don't love the way it performs, send it back for a full refund.