The single gel thermal pack measures approximately 1-3/4 inches wide X 5-1/4 long and is covered with a soft cotton fabric for added comfort. These gel packs can be applied warm or cool, wet or dry to promote a feeling of well-being and the handy thermal mini purse will maintain their temperature for hours until ready for use. For warm weather, place them in the freezer overnight and then put them into the thermal mini purse until ready for use. Perfect for golf, tennis, hikers, bikers, runners, outdoor spectator sport watching, BBQ’s, house cleaning or those annoying hot flashes. Alternately they may also be placed in the microwave for 30 to 40 seconds maximum to add a little warmth on those cold days. Easy care hand washable.