Stay cool and comfortable on the job with this innovative cooling solar powered hard hat. The Kool Breeze Solar Hard Hat delivers powerful ventilation with a built-in fan and a high/low switch that lets you adjust the airflow. The solar powered hard hat fan works both indoors and out, making it great for any job site. With its integrated fan and thin solar panels, the hard hat remains light-weight so it won't slow you down or add any extra bulk to your gear.Features:Lightweight, yet rugged polyethylene shell (HDPE) offers excellent head protectionFull Brim2 Speed Level: High/low switch to adjust flow of air throughout the hatAccu-fit 8pt adjustable ratchet suspension system; bends at flex points to conform to the head for added comfortLarge ratchet knob adjusts easily - with or without glovesPortable wall charger (for the days that you are not in the sun)Complies with Osha; ANSI / ISEA Z89.1 standards; Type I, Class CRechargeable Battery life (3 to 4 yrs)Charge time: At least 2.5 hours. The light on the battery will turn to a solid green once fully charged.