Purchase at your peril
Purchase at your peril. Great helmet until the tensioning wheel for the retention strap broke. Followed the helpful directions on the website and tried four (4) times to reach Lumos via their listed email support. Absolutely no response whatsover. No phone number to call. No way to contact the company. LBS's think they are in the process of going out of business. Helmet is now a flashing desk ornament.