Alpinestars SM5 Sail yellow cross helmet

The SM5 helmet has been designed to provide MX riders with a safe and specially designed helmet to offer optimal protection and comfort. The lightweight SM5 helmet features a thermo-injected shell incorporating a special improved polymer blend of varying degrees of thickness that is engineered to offer the optimum combination of impact protection and light weight, while the five density EPS liner ensures the correct density in the correct area for better impact absorption.

An engineered raised area with padding effectively reduces forces transmitted to the collarbone and a patented visor release system that ensures the visor is released with the correct pre-determined amount of force, regardless of the angle of impact.

The lightweight outer shell is constructed with a technologically advanced impact resistant thermoplastic in three anatomical shell sizes, plus three individual sizes of EPS inner liner with a combination of inner liner and cheek padding to offer 6 unique sizes and to ensure better fit and protection.

Revised the Medium, Large, XL and 2XL bottom shell volume to be approximately 3% wider to make the helmet easier to put on and take off, where the increased helmet volume also improved the handling performance of the impacts that are now 44% lower than the normal speed threshold.

Per the new ECE 22.06 standard, the SM5 achieves a normal speed impact score that is 44% better than the current figure of 33%, as well as a linear impact score that is 32% better at low speed and 31% better at high speed. speed compared to the prevailing standard.

The internal and external surfaces are designed to minimize the effects of oblique impacts. To help combat and mitigate those rotational impact forces, Alpinestars engineered another proprietary technology by creating a low friction surface on the inside surface of the EPS liner. For the ECE 22.06 standard, which now includes oblique rotational impact assessment, the SM5 scores 70% under the new regulation.

Multiple density inner lining to ensure the correct density in the correct area for better impact absorption.

New redesigned chin bar profile, where the base area has been specially sculpted to give a raised section of relief to free up the collarbone, with a new softer EPS liner that extends beyond the helmet shell itself and is covered by a a more flexible rubber compound that offers a reduced chance of any type of collarbone injury.

The patented visor release system ensures that the visor is released with the correct pre-determined amount of force, regardless of the angle of impact.

Maximized ventilation and high levels of heat exchange thanks to the air intakes and multiple exhaust.

The ECE version of the SM5 helmet weighs 1,350 grams for a medium size, and 1,420 grams for the ECE version with visor.