Maximum, professional heat stress relief

• Proven to reduce core body temperature
• Ideal for use under other protective equipment
• Effective even in high-humidity environments
• Provides up to four hours of cooling without restricting movement

Used by the U.S. Military for the last 15 years, this vest has proven its effectiveness in preventing heat stress. Simply freeze the reusable gel packs (Item 10121, sold separately) and insert into the vest for up to four hours of cool comfort while you work. Gel packs remain flexible when frozen, so you can move without restriction. Durable, flame-resistant, 100% cotton outer shell. Velcro® side closure. Over-the-shoulder style holds six gel pack strips. Fits chest sizes 38"-57". USA made.