Product details:

Started with a stylish shell made of High Performance lightweight Kinetic Polymer Alloy KPA. It has just the right blend of retrocool with a technical edge. Imagine a halfshell motorcycle helmet that offers flowthrough ported ventilation to keep you cool on the hottest of days. The short peak and Twin Shield System drop down sun shield will protect your eyes when the sun is in the horizon. The sun shield itself as a unique twostage adjustability lock it 1/2 way for just a little shade or fully open for total sun protection. Its called Freedom of choice. Dualdensity EPS meets or exceeds DOT standards. Finish it off with a DOT approved micrometric quick release chinstrap and you have all the convenience and comfort of a traditional motorcycle half helmet but with the technology of the future. Intermediate oval fit. Meets or exceeds both DOT and ECE standards.21 1/4 Small 55-56 cm 21 5/8
22 7/8 Medium 57-58 cm 22 1/2
22 7/8 Large 59-60 cm 23 1/4
23 5/8 X-Large 61-62 cm 24
24 3/8 2X-Large 63-64 cm 24 3/4
25 1/4 3X-Large 64-65 cm 25 5/8
26 4X-Large 66-67 cm 26 3/8