For cervical spine immobilization and extrication.
Maintain head in neutral position while supporting muscles, bones, ligaments and nerves.

| Size | Suitable Sizing (inch) | Suitable Sizing (cm) |
|---|---|---|
| S | 10"~13" | 25~33 |
| M | 13"~16" | 33~41 |
| L | 16"~19" | 41~48 |
| XL | 19" up | 48 up |