Alpinestars Sm5 Compass Helmet

The SM5 Compass Helmet from Alpinestars is an MX/off-road helmet built for riders seeking lightweight construction, strong impact protection, ventilation and safety — ideal for motocross, trail, dual-sport use. 

Key Features

• Thermo-injected polymer outer shell available in two shell-sizes for structural strength and light weight. 

• Multi-density EPS inner liner engineered to provide targeted impact absorption across zones. 

• Dual concept impact-energy management: resin-coated inner shell reduces linear acceleration, plus an elastic joint between inner shell and comfort liner allowing independent movement in oblique impacts — reducing rotational forces. 

• Emergency Release System (ERS) with removable cheek pads for safe, easy removal by trained personnel after a crash. 

• Quick-release, multi-angle visor system that sits flush on the shell (no screws), improving safety and simplifying maintenance/cleaning. 

• Excellent ventilation: multi-air inlets + exhaust ports + internal air-channel network for high airflow and heat exchange — useful for hot, long rides or intense MX sessions. 

• Integrated hydration-tube compatible channels routed through cheek pads (great for long trail or enduro riding). 

• Removable, washable, moisture-wicking and anti-microbial comfort liner and cheek-pads for hygiene and comfort. 

• 26 mm textile chin strap with stainless-steel D-rings for secure fastening. 

Materials / Protection

• Outer shell: advanced thermo-injected polymer shell, engineered for strength and weight optimization. 

• Inner shell / liner: multi-density EPS for impact absorption, designed to work with shell/liner dynamics to reduce both linear and rotational impact forces. 

• Interior: comfort liner + cheek pads (washable, moisture-wickling, anti-microbial). 

Certifications

• Certified to ECE 22.05 standard. 

• DOT FMVSS 218 certified for North America.