Safety Helmets: Made of high quality polymer, which increase its strength and stability. Soft feel inner harness reduce fatigue long hours working. Light in weight. Comes with universal adjustable chin strap. Unique 4 point cradle for reduction of point impact. Triple corrugation of the shell giving it an increased impact resistant quality.-12 Different shades available.-Confirming IS 2925:1984-Director general of mines safety (DGMS) certified-Central labour institute (CLI) approved.-Central mining research institute (CMRI) approved.