This is an Evaporative Cooling Product (ECP). Just submerge in cool water for several minutes, blot dry and wear! Fabric retains hydration keeping you cool for hours.

Comfortable, quilted nylon outer with polymer embedded fabric inner, water-repellant nylon liner, and hook & loop attachments Effective relief from heat stress. Attach with hook & loop directly to hard hat liner (hard hat not included). Provides 5-10 hours of cooling relief per soaking; lightweight, durable and washable.