280 HP261R Cap Style Hard Hat with HDPE Shell, 6 Point Nylon Suspension and "Sure Lock" Ratchet Adjustment Type 1 Class E _related_passive earmuffs Fast Rehydration: electrolytes prevent and Neoprene Fast Rehydration: electrolytes prevent and combat dehydration quickly in hot environments Rapid Muscle Recovery: critical branched chain amino acids help to promote energy production and minimize inflammation and muscle fatigue On the Go Packaging: adding one flavored solo shot to 16 oz of water for ease of hydration Proprietary electrolyte formula including Sodium Teflon® treated face shields HP241 Series also available with added "Ventilation" for added relief from heat