100% New Brand in elegant packagingprofessional design, fashion modeling, effectively reduce wind resistance.Head circumference can be adjusted by Built-in regulator, can be control between 56-62cm.Lining contains velvet, feels more comfortable when wear it. It also equips with a caution light design, to ensure the safety of cycling. Adjust by rotaating the back knob with the LED light .Steps for wearing the helmet:1. Wear it in the proper position. 2. Adjusting the straps.3. Adjusting the chin strap 4. Getting the correct fit for your helmet