The popular One K™ Defender with eye-catching elegant Chrome venting accents and an easy to clean matte finish. OneK Helmets boast the perfect synergy between advanced technology and aesthetically pleasing design. With enough features to appeal to those seeking everything a helmet could possibly offer, wrapped in a package that traditionalists can appreciate, One K™ has the best of both worlds. Certified to ASTM standards and CE EN Standards.
Features:
- Matte Polycarbonate and Advanced ABS Composite outer shell
- Two side, two front, one back, and two center stripe vents
- Comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle
- Washable quick-dry, moisture wicking, anti-microbial liner
- ASTM/SEI F1163-15 certified
| HELMET SIZE | CENTIMETER MEASUREMENT | HAT SIZE |
|---|---|---|
| X-Small | 51 – 52 cm | 6 3/8 – 6 1/2 |
| Small | 53 – 54 cm | 6 5/8 – 6 3/4 |
| Medium | 55 – 56 cm | 6 7/8 – 7 |
| Large | 57 – 58 cm | 7 1/8 – 7 1/4 |
| X-Large | 59 – 60 cm | 7 3/8 – 7 1/2 |
| XX-Large | 61 – 62 cm | 7 5/8 – 7 3/4 |
