Hot Hands Body & Hand Super Warmer 18 Hours 40 Pack. They provide up to 18 hours of continuous warmth for the hands and body. Features of Hot Hands Body & Hand Super Warmer 18 Hours: Larger and Longer Lasting Up to 18 Hours of Heat Air-Activated Ready to Use TSA Approved Package Contents: Hot Hands Body & Hand Super Warmer 18 Hours The Hot Hands Body & Hand Super Warmer 18 Hours is a quality addition to the Hot Hands lineup. For more great deals on Heaters & Heat Packs by Hot Hands please browse our Hot Hands Camp & Hike page.