Heat Pack - 40 Hour - 2 Pack Heat Pack - 40 Hour - 2 Pack includes two disposable shipping warmer heat packs for helping maintain warmth during the transport of tropical fish, corals, reptiles, amphibians, insects, live foods, flowers, and plants. 40 Hour Heat Packs for Livestock Transport These 40 hour shipping warmers are designed for temperature support in insulated transport and shipping containers. They are useful when cold weather could cause temperature-sensitive livestock or aquarium-related items to chill during transit. Shipping Warmer Features Two disposable 40 hour heat packs per package Designed for transportation of temperature-sensitive livestock and goods Useful for tropical fish, corals, reptiles, amphibians, insects, live foods, flowers, and plants Disposable shipping warmer format Activated by exposure to air after opening the outer package Helps support stable packing temperatures in cold-weather transport when used correctly Heat Pack Specifications Product type: Disposable shipping warmer heat pack Heat duration: Up to 40 hours Package quantity: 2 heat packs Application: Insulated livestock and temperature-sensitive item transport Transport and Safety Notes Use only as appropriate for the species, weather, box size, travel time, and packing method. Heat packs require air exposure to function and should not be placed directly against livestock bags, animals, corals, or plants without proper packing separation. Monitor local conditions and avoid overheating in mild weather. Use Directions Open the outer packaging when ready to use and allow the heat pack to activate before placing it in the insulated container. Position the heat pack so it has access to air and is separated from direct contact with livestock bags or delicate contents. Dispose of the heat pack after use. What's Included Two 40 Hour Heat Packs