Spy Optics Neutron MIPS Snow Helmet Introducing the Neutron helmet, the brainchild of our wildest dreams and engineering brilliance. We didn’t just slap some foam in a shell and call it a day—this beauty is an injected mold masterpiece that’s so lightweight, you’ll forget you’re wearing it. It's packed with Mips for brain-saving tech, and our Snug Life dial guarantees a fi t so precise, you’ll feel like it was custom-made. And yes, we made it super cozy. Technologies Adjustable Fit System / Adjustable Ventilation / Eco-Friendly Materials / Goggle Retention System / MIPS Technology / Microfleece Lining / Removable Ear Pads Weight 577g Sizing S-M: 51cm-54cm M-L: 55cm-58cm L-XL: 59cm-62cm