Uni Heat 40 Hour Heat Packs a great for shipping reptiles or feeder insects to colder destinations overnight. Also a great item to keep on hand in case of power outages or when traveling in cooler weather. Good for keeping sick dragons warm overnight when needed. Surface temp slowly increases to about 100ºF whithin 15-18 hours of activation or when opened and gradually taper off over the next 16 hours.
Always ventilate boxes when shipping animals with heat packs.