Soman motorcycle racing glass rigid helmet double lens motorcycle men and women all year round space helmet

For beter comfort in helmet riding,The introduction of airflow through the top vent can relieve the sultry air generated inside the helmet.Thereby,the heat generated inside the helmet is discharged from the rear vent. WHAT IS FIBERGLASS MATERIAL?The relative density is between 1.5-2.0,which is only 1/4-1/5 of carbon steel,but the tensile strength is very close or even higher than that of carbon steel,and the specific strength can be compared with high-grade alloy steel.Therefore,in aviation,Rockets, space vehicles,high-pressure vessels and other products that need to reduce their own weight,have excellent results