Description: This Case of (40 Pairs) of HotHands Hand Warmers are ready to use, air activated, safe, and produce natural heat. Each packages contains 2 warmers (1 Pair). To use, simply remove the hand warmer from the outer packaging and shake to activate. Place the warmer in pocket or glove for maximum efficiency. Warmer heats up to an average of 135 degrees F in 15 to 30 minutes. This hard warmer will produce heat for up to 7 hours. Packaged in the display case.