The Cool Vest Classic is a cooling vest designed for use by individuals with multiple sclerosis or other neurological or physical disabilities which cause intolerance to heat. This vest features multiple one-time adjustment straps for a customized fit and full-length front zipper closure. The vest uses four standard Cool Packs (included) with 65-degree phase change material technology to provide two to two and one-half hours of consistent 65-degree cooling in conditions up to 100 degrees Fahrenheit. The Cool Packs can be recharged in approximately 20 minutes in ice water or a refrigerator (freezing is not required). The vest is available in Supplex material, Banox flame-resistant material, or poly-cotton twill. OPTIONS: Sets of four additional Cool Packs are available. SIZES: Small, medium/large, or extra large. COLOR: The Supplex vest is available in blue, orange, white, khaki, black, or camouflage. The Banox vest is blue. The poly-cotton twill vest is khaki. WEIGHT: 4.8 pounds.