Warmers are non-toxic and made with all-natural ingredients. Plus, they’re disposable and compact for easy use on the go. Packs are not reusable and should be disposed of after each use. The N-Ferno 6990 Hand Warmer Packs are long lasting and air-activated, instantly delivering up to 12 hours of heat. They’re great for placing in your jacket pockets, gloves or other warming accessories. They’re also easy to insert into built-in pockets in thermal accessories such as the N-Ferno 6980 Hand Warmer Muff, N-Ferno Hard Hat Liners or ProFlex 825WP Winter Work Gloves. The N-Ferno 6995 Insole Foot Warmers deliver up to 8 hours of warmth for the foot. They’re flexible, moving with the foot to improve comfort. The thin and compact design prevents bulk and fits into any work boot or shoe, moving flexibly with the foot for all-day comfort. Full-coverage hot packs will provide heat for the entire foot. When done with the pad, simply toss and go. The N-Ferno 6992 Adhesive Toe Warmers offer long lasting heat, delivering up to 7 hours of warmth. Specifically designed as a heating pad for toes, they protect part of the body most susceptible to frostbite and hypothermia. As a wearable heating pad, they’re perfect for keeping toes warm for long hours during work or play. HOW TO ACTIVATE To activate, simply open the pack. They will begin to heat up as soon as they’re exposed to oxygen—no batteries required. You can also shake the pack to speed up the warming process. Apply the feet warmers using the adhesive to the bottom of the feet. Then, slide feet into work boots or shoes for consistent warmth. Packs are not reusable and should be disposed of after each use (up to 8 hours). These toe warmers are designed to adhere to the insole of the shoe or on the sock near the toes. Once applied, the pack is safe to wear inside work boots or shoes. Packs are not reusable and should be disposed of after each use (up to 7 hours). Ideal for workers exposed to the elements while on the job in industries such as construction and mining, transportation, warehousing or delivery. They’re also great off the clock during activities such as outdoor sports, hiking, walking, hunting or fishing.