The build quality is mediocre nothing impressive, the interior is decent, comfy true to size. The chin guard is inadequate it needs replacement because wind gets into your eyes from the chin area, i replaced with shoei Chin Curtain D (19.02.016.0). Overall ok.
サイズチャート
A. Use a measuring tape around the widest point of your head (approx. 1 cm above the ears) to get the correct measurement for a helmet.
Apply the calculated value from the table.
Helmet
Type A: EXO 520 Air / EXO 520 Smart Air / EXO R1 Air / EXO R1 Carbon Air / EXO 1400 Air / EXO 1400 Carbon Air / EXO 490 / EXO HX1 / EXO HX1 Carbon SE / EXO 491 / EXO 220 / EXO 100 / Padova II / VX 22 Air / VX 21 Air / VX 16 Air
Ordering Size
Head circumference in cm
XXS
51-52
XS
53-54
S
55-56
M
57-58
L
59-60
XL
61-62
XXL
63-64
XXXL
65-66
Helmet
Type A: EXO 390
Ordering Size
Head circumference in cm
XXS
51-52
XS
53-54
S
55-56
M
57-58
L
59-60
XL
61-62
XXL
62-63
XXXL
65-66
Helmet
Type B: EXO 930 / EXO 930 Smart / EXO Tech / EXO Tech Carbon / EXO 920 Evo / ADX 1 / ADX 2 / EXO 3000 Air / EXO S1 / Belfast Evo / Belfast Evo Carbon / Brisbane / EXO City / EXO Combat Evo / Covert X / EXO 230