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The Arai XD4 Helmet replaces the category leading Arai XD-3 Dual Sport Helmet.
Notable improvements for the XD4 are improved ventilation with redesigned face vents and a venturi vent at the brow, adjustable cheek pads, a new visor system for improved visibility and a new locking shield for aerodynamics.
- New comfort headliner, with micro fitting 5mm peel away temple pads.
- Fully removable / replaceable / washable Interior: Comfort head liner, Cheek pads, Chinstrap covers.
- Dry-Cool technology keeps you dry and cool for greater comfort.
- Patent pending, New FCS (Facial Contour Support) cheek pad design, also with a 5 mm peel away micro fit feature.
- New shell shape for better aerodynamic stability at higher street speeds.
- New exhaust ports added to the top diffuser vents.
- New chin vent with more intake ports.
- Larger sculpted side cowl vents improve ventilation.
- Meets or exceeds SNELL and DOT standards.
|Size||Head Circumference||Hat Size|
|2X-Small||20" - 20 1/2" (51 - 52 cm)||n/a|
|X-Small||20 7/8" - 21 1/4" (53 - 54 cm)||6 1/2 - 6 5/8|
|Small||21 5/8�" - 22" (55 - 56 cm)||6 3/4 - 6 7/8|
|Medium||22 1/2" - 22 7/8" (57 - 58 cm)||7 - 7 1/8|
|Large||23 1/4" - 23 5/8" (59 - 60 cm)||7 1/4 - 7 3/8|
|X-Large||24" - 24 3/8" (61 - 62 cm)||7 1/2 - 6 5/8|
|2X-Large||24 3/4" - 25 1/8" (63 - 64 cm)||7 3/4 - 7 7/8|
|3X Large||25 1/2" - 26" (65 - 66 cm)||8 - 8 1/8|
1. Measure your head size. To do this, pass a tape measure horizontally around your head at a height of about one inch above your eye brows. When done properly, you will have measured the largest part of your head.
2. Check your measurement with the helmet sizing chart and select the closest size. As the helmet may not always meet your head size exactly, and your head measurement may fall between two sizes, first try the smaller size.
WHEN YOU RECEIVE YOUR HELMET
1. Expand the helmet opening by pulling outwards on each chinstrap, and slide your head into the helmet. If you are unfamiliar with helmets you may be reluctant to pull the helmet down, as it may feel too tight. Even if the helmet is difficult to put on, please use the smallest helmet possible. The helmet should feel snug. If the helmet is not tight, it is too big for you. New helmets will break in and loosen slightly over time.
2. Once the helmet is on:
- Check that the helmet inner lining fits snugly all around your head.
- Check that the top pad presses on the top of your head.
- Check that the cheek pads press up against your cheeks. When you open and close your mouth, you should drag your teeth along the inside of your cheeks.
- Check to make sure that you cannot easily slide your finger into the helmet along the side of your temple.
- Hold the helmet with one hand on each side. Without moving your head, try to move the helmet up and down, and side to side. You should feel the skin of your head and face being pulled as you try to move the helmet. If you can move the helmet around easily, it is too big. Try a smaller size. Please note that during this check, the chinstraps should be properly fastened.