The Sierra offers riders ASTM /SEI certification coupled with rugged, outdoor Western styling. The helmet is designed to be ultra-lightweight, extremely well ventilated, and comfortable for long days in the saddle. The Sierra is the perfect Western headgear for those who want comfort, Western styling, and Troxel's leadership in protection.
The patented GPS III system introduces the most advanced stabilization and fit adjustment system. The system wraps around the interior of the helmet providing a sure, comfortable grip while the sculpted tensioning mechanism adjusts with a light touch. The GPS III won't pinch or pull long hairstyles and is ponytail compatible.
|Head Size||19 5/8||20||20 3/8||20 3/4||21 1/4||21 5/8||22||22 3/8||23 1/8||23 5/8||24||24 3/8|
|Hat Size||6 1/4||6 3/8||6 1/2||6 5/8||6 7/8||7||7 1/8||7 1/4||7 3/8||7 1/2||7 5/8||7 3/4|