Ⓐ Front & back: Lightweight impact-absorbing material as main structure.
Ⓑ Side wall: Lightweight impact-absorbing material + high density foam to deflect side impact.
Ⓒ Head & bottom: lightweight impact-absorbing material + high density foam + HDPE panel act as a cage that prevents from crushing.
Ⓓ Bottom pad: Absorb vertical impact, can also be adjusted according to the position of the strap pin.
Ⓔ Adjustable Dual Neck Brace system: Bottom brace is adjustable to secure the whole neck from rear and side impact.