Ergodyne Chill-Its 8935CT Small - Medium Hi-Viz Lime Evaporative Hat With Reflective Strip features advanced PVA lining inside hat rim to reduce heat stress. It is quickly activated when run under water for 1 min and provides cooling effect up to 4 hrs. It has patented design and 1" level 2 ANSI-compliant tape of contrasting color. It comes with ANSI certified 150D Oxford polyester and finds application for road construction, utility crew, survey crew, construction, railway workers, baggage handler, warehousing/Distribution.