HotHands Lap Warmers allow you to stay warm and conquer any chill, the ultimate solution for the cold! Perfect for outdoor enthusiasts and winter warriors, the Lap Warmer provides long-lasting heat to keep you toasty in any situation. This large lap warmer is perfect for tailgating, camping, and other situations outdoors in cold weather while you?re sitting. The HotHands family of air-activated warmers all contain a mixture of natural ingredients that when exposed to air react together to produce heat. This is accomplished through an extremely fast oxidation process. Ingredients include: iron powder, water, salt, activated charcoal and vermiculite. These HotHands warmers produce long-lasting steady heat with an average of 140�F (60�C) for a duration up to 8 hours. See product package for details. Whether you're camping, hunting, or watching a game, these odorless warmers are made of natural ingredients and are your go-to companion. Designed for ease of use, simply open the package, place warmer over your clothing and cover with blanket. Each Lap Warmer is approximately 16? x 10?. Don't let cold weather hinder your adventures. HotHands are TSA-approved and there is absolutely no problem with taking them aboard or using them during flight. They are completely safe for air travel.