Cool Medics M1863-OR-SM Orange Contractors Cooling Vest With Reflective Stripes, Small Cools up to 6 hours at 98 degrees Light weight and won't get your clothing wet 2 - 2-Inch rows of reflective striping across the shoulders and around the mid-section. Conforms to ANSI 107-Class 2. Zipper front closure with adjustable back tabs to ensure a snug fit Reusable, immerse in water (10-30 seconds) to activate the cooling process