"The Giro Women's Register MIPS II LED Helmet fits around a ponytail instead of forcing a choice between the two. A two-piece shell fuses a hardshell outer to an in-mold lower wrap for a helmet that stays light without losing durability, and the Roc Loc Sport MIPS® system dials in a secure fit with one hand, even with hair pulled through the back. MIPS® Evolve Core adds rotational protection underneath it all, and a built-in LED light means one less accessory to remember before a ride that runs past sunset. What Our Gearhead® Experts Are Saying:""I've stopped choosing between a tight ponytail and a helmet that actually stays put, since the fit system tightens around both without any pressure points."""