|The Sierra offers serious protection at a tremendous value. Its feature-rich design maximizes comfort and protection, while the HairPort SX dial fit system provides a simple, more secure setup for women.
One-size system based on women’s head sizing, designed for easy and accurate fit.
Ponytail-ready HairPort SX fit system with micro-adjustable dial for an easy, accurate fit.
4th Dimension Cooling System optimizes ventilation.
In-moulded shell improves strength and reduces weight.
Tri-Fix web splitter for improved comfort and ease of strap adjustments.