Ergodyne Chill-Its 6710CT One Size Hi-Viz Lime Evaporative Cooling Triangle Hat with Cooling Towel is made up of advanced PVA material keeps cool and provides comfort. It is activated easily when run under water for 1 min and reduces heat stress, fatigue. It has lightweight and low profile that makes it perfect for under hardhats. It features patented design and tie closure. It finds application for construction, trades, maintenance, landscaping/grounds, assembly/fabrication, material handling, freight/baggage, warehousing/distribution and Iron/steel fabrication.