Table of Contents
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Read this manual carefully before use, and retain it for future reference.
1. Product Overview
3M Reflective
Sticker
Woven Strap
2. Size Selection & Measurement
Helmet Measurement Method
Because the helmets are different in size, you need to choose the size that suits you. A er measuring your
head circumference, you can select the right helmet size according to the circumference. If the helmet is too
loose or too tight, you can adjust it by turning the adjustment wheel until it is comfortable to wear, or try a
different size helmet.
Helmet
Head Circumference Measurement
Hairline
Occipital
Bone
The head circumference needs to be measured twice to get the maximum
value. The first measure, by using a so measuring tape, is around the
hairline to the point that 2 cm (about 0.8 in) below the occipital bone. The
second measure is around the brow bone to the occipital bone.
Note: Due to different head shapes, the helmet may not match your head completely. If you feel uncomfortable
while wearing it, please select a different size.
This version is for private use only and should not be distributed.
Foam Lining
Adjustable
(Removable)
Buckle
Size
Head Circumference
S
M
Brow Bone
01
Strap Pad
52 - 55 cm
55 - 58 cm
Head Width Measurement
Occipital
Bone
Locking
Buckle
Adjustment
Wheel
Head Width
≤16.5 cm
≤17.4 cm
Head Width
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