Keep your hands toasty during the coldest of weatherActivates when exposed to air and stays warm for up to 8 hoursCase of 40 pairs80 individual hand warmers in totalWarmer should be placed in your pocket, not attached to skinDo not put warmer directly on skin because its temperature can exceed 160 degrees Fahrenheit and cause discomfort or burnsDitch the stank, these warmers are odorlessAll-natural materials make these hand warmers safe and disposable This product ships in approximately 1 days