High impact resistant ABS helmet; ventilation holes; rain gutter; durable stainless steel mesh visor; strong flip up and down function; detachable sun peak; articulated cap-mounted ear cups; height-adjustable ear muffs; NRR value 23dB; "Air Flow Control" technology for optimum and consistent noise attenuation and enhanced communication; snap-in comfortable ear cushions; ratcheting adjustment harness; head size 20-24.5" (50-62 cm); snug-fit harness and highly absorbent sweatband.