The GPA Redline Speed Air 4S helmet features a new worldwide safety concept. This new concept enables the helmet to absorb shock in successive layers, doubling your security. What happens during an impact to the helmet? The point of impact is the center of a shock wave that can be the cause of injury. Traditionally helmets are composed of two layers – a rigid shell and an EPS foam liner. The GPS Redline collection is composed of four layers, offering remarkable shock absorbing properties and better resistance to lateral compression.
The composition of the GPA 4S helmet is as follows:
1S: Consists of the outer shell to cushion the initial shock waves. The helmet shell is manufactured from absorbent polymer designed to deform under impact.
2S: This layer absorbs the residual shock wave.
3S: This is the main hull, reinforced with fiberglass, it provides rigidity and protection of the cranial box.
4S: This layer comprises of a shell in EPS. It further decelerates shock wave crashing, allowing no forward pressure on the cranial box and minimizes the risk of cranial lesions.
Other features which set the GPA 4S helmet apart include maximum ventilation made possible with three large vents in the front and two on the back of the helmet to allow air flow within and between the two structures, a red leather interior which offers stylish aesthetics and durability with a leather chin strap and interchangeable and adjustable interior foam padding to ensure a comfortable fit.
The helmet lining is manufactured from the technologically advanced Coolmax fabric which is breathable, antibacterial and machine washable.
In addition the helmet sports a shaped turbo effect visor which channels airflow to the air vents and reduces lift at high speeds. It is made of elastomeric material to reduce the risk of fracture of the nose and is also interchangeable.
The GPA S4 helmet is certified to the CE VG1 safety standard and complies with the American SEI (ASTM F 1163-01) safety standard.