AirBreaker Helmets
| Size |
Head size (cm) |
| S |
51 - 55 |
| M |
52 - 58 |
| L |
59 - 61 |
PURL-Y, Hyp-E, Hyp-E ACE Helmets
| Size |
Head size (cm) |
| S |
51 - 55 |
| M |
54 - 58 |
| L |
57 - 61 |
Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Please use this chart as a guide only.