Whether you need to soothe arthritic aches and pains or just want to keep your hands toasty warm this winter, these pocket warmers are the way to go! The 100% natural filling heats up in just 15 seconds in the microwave to provide up to 20-30 minutes of warmth you can tuck in your pocket. With washable fleece covers. Set of 2. Approx. 3.5 x 3.5 x 1.