Air-activated XTM Toasty Toe warmers keep Toes and Fett toasty for up to 10 hours. No shaking or kneading required; just open the package and put the warmers in your shoe or for a few minutes to start the process. Toasty warmers are standard equipment for skiers, snowboarders, campers, hikers or anyone who enjoys outdoor activities when the weather is cold. Packed as a pair to keep both of your Tootsies toasty warm.