| Type | |
| Model | RK37 |
| Vented | YES |
| Vents | 11PCS |
| Shell Material | ABS |
| Liner Material | Closed-cell EVA foam |
| Ear Coverage | No |
| Size | Head Circ. (cm) |
| M | 56-59CM |
| L | 58-61CM |
| XL | 59-62CM |
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