Heat Factory Ragg Wool Glove - Men's Wheat. When exposed to the air an oxidation process takes place that generates heat. Unopened the Heat Factory Warmers have a shelf life of three years or more. Specifications for Heat Factory Ragg Wool Glove - Men's: Manufacturer: Heat Factory Age Group: Adults Application: Winter Gender: Male Color: Wheat Additional Features: 12 pairs Fabric/Material: Wool Glove Type: Gloves Features of Heat Factory Ragg Wool Glove - Men's: Wheat Men's Case pack = 12 pairs Package Contents: Heat Factory Ragg Wool Glove - Men's Heat Factory 994M: Ragg Wool Glove - Men's Wheat