This idea comes from our friend Ashley Poskin. They are fully customizable from the shape and size right down to the fabric. "I found that a rectangle fits snug as a bug inside mittens of little hands, as well as the front pocket of a pair of adult size jeans," she says. "A circle pouch feels nice to hold in your hands or on your lap when you're kicked back and relaxing, and the larger rectangle is excellent for stuffing inside coat pockets on very cold days." Add a relaxing scent by including dried herbs such as lavender or chamomile, or simply fill the fabric pouches with rice.
To warm up the pouches, place them in the microwave for 30 seconds, adding time (depending on your microwave wattage) as needed until they are warm to the touch. When choosing fabric, a natural fiber such as 100-percent cotton is best. And if it's time to retire your favorite flannel? Give it new life by making it into reusable hand warmers—the soft, warm material will feel wonderful next to cold hands.