Onyx Cool's 80 degrees Safety Pro Vest is made with a specially formulated plant-based cooling phase material (PCM) that safely and comfortably cools the core to protect against heat stress, increase stamina and enhance performance. Provides safe, effective cooling for anyone that works hard in the heat: construction, manufacturing and utility workers; athletes and officials; surgeons and operating room nurses; first responders, police and military. Re-cool by laying the vest on a flat surface in room temps below 80 degrees Fahrenheit, air conditioned vehicle, or in a cooler of ice. Latex-free and made in the USA! To clean, wash with mild soap and water then air dry.