heat pack in winter for skier various models no odor,no radiation natural ingredients specifications for OEM processing Nameheat pack in winter for skierSpecificationJapanse Skill,Inner size: 9.6*7.0 cm,Max Temp: 60centigrade degree, ave temp:50 centigrade degreeDuration time: 12hours or longerIngredientsIron powder,activated carbon,vermiculite,water and salt.CharacteristicsEasy to use,no odor, ...