OF-77 Derk Open Face Helmet
The OF-77 features the all new SpaSoft Coolmax interior which combines the moisture wicking properties of Coolmax with the anti-microbial properties of bamboo. The OF-77 is like having two helmets in one. It offers the comfort of an open face helmet with the ability to quickly and easily convert into a full face helmet with the installation of the optional snap-in jaw piece.
- New SpaSoft DuPont Coolmax® interior keeps you dry and comfortable. Coolmax® wicks moisture away from your body and dries quickly. Charcoal bamboo fiber keeps odors away by eliminating bacterial growth
- Removable, adjustable, washable Spa Soft Coolmax® interior allows for easy cleaning and custom fitting
- GMAX D.E.V.S (dual exhaust venting system) top and rear vents reduce temperature by allowing hot air to escape from the top of the helmet
- Vents close to completely seal out the cold
- 100% UV400 protection from the anti-scratch hard coated face shield for a longer lasting clear view
- Tinted inner sun shade with anti-fog coating
- Lightweight ABS shell. Large size only 3.2 lbs.
- Optional anti-fog, maximum seal double lens face shield available P/N 72-3547
- Optional brake light kit available P/N 72-3781
- Optional snap-in jaw piece with breath guard and chin curtain available P/N 72-3570
- DOT approved
- Lightweight Poly Alloy Shell
To find your approximate size measure the circumference of your head one-inch above eyebrows and across the largest portion of the back of your head.
Sizing guideline (head circumference inched measured above the eyebrow)
XS: 20 7/8 to 21 1/4
Small: 21 5/8 to 22
Medium: 22 7/16 to 22 3/4
Large: 23 1/8 to 23 5/8
XL: 24 to 24 3/8
2XL: 24 3/4 to 25 3/16
3XL: 25 9/16 to 26