Perfect for Keeping You Warm on Gameday. Safe. Natural. Odorless. Air-Activated Anyone who enjoys the outdoors and wants to stay out longer will appreciate little hotties warmers! They are odorless, environmentally safe and provide a heat source for comfort in all cold conditions. Little Hotties Hand Warmers are the choice of athletes, anglers, hunters, campers, spectators, skiers, construction workers and more. The average activated temperature is 135°F . No Batteries! No Microwave! <.