ALTEC Liner Kit

Thin

Black

Helmets
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Size Chart
XS/S
S/M
L/XL
$ 22

Adult Helmets Size Chart

Aircraft & Status Helmets

 
IN
CM
Liner Size
X-Small
20 7/8 - 21 1/4
53 - 54
14 MM
Small
21 5/8 - 22
55 - 56
12 MM
Medium
22 1/2 - 22 7/8
57 - 58
12 MM
Large
23 1/4 - 23 5/8
59 - 60
14 MM
X-Large
24 - 24 3/8
61 - 62
14 MM
XX-Large
24 3/4 - 25 1/4

  

Trajecta Helmet

IN
CM
Small
20 1/2 - 22
52 - 56
M​edium
22 - 22 7/8
56 - 58
Large
22 7/8 - 24
58 - 61
X-Large
24 - 25 1/4
61 - 64


Altec Helmet

IN
CM
X-Small/Small
19 5/8 - 21 5/8
50 - 55​
Small/Medium
21 5/8 - 23 1/4 
55 - 59
Large/X-Large
23 1/4 - 24 3/4
59 - 63

Youth Helmets Size Chart

* All measurements are in inches
Head Circumference
S 18 1/2"-18 7/8"
M 19 1/4" - 19 5/8"
L 20 1/8" - 20 1/2"