The Motor Sport Cool Vest is a cooling vest designed for use by individuals with multiple sclerosis or other neurological or physical disabilities which cause intolerance to heat. Originally designed for motor sport activities, this vest uses four cooling packs (included) with 62-degree Fahrenheit phase change lightweight material to provide two to two and one-half hours of cooling in conditions up to 100 degrees Fahrenheit. This vest can be worn under approved flame-resistant racing suits, street riding leathers or motocross chest protectors. The cool packs can be recharged in approximately 20 minutes in ice water or a refrigerator. The vest is available in Supplex-nylon. SIZES: One size fits all. COLOR: Gray and teal. WEIGHT: 4.8 pounds.