... 3,duration:12 hours 4,environmental 5,Self-heating warmer patch Self-heating warmer patchUse area:Designed for fishmen,golfers, skiers ... outer package and peel off the paper strip. 2. Stick it on your back or your waist or somewhere you ... weight40 gpacking300 pcs/cartonheating duration12 hoursThe Shape, size, and heating time, highest temperature and average temperature can producted all according ...