UniHeat 72 Hour Shipping Warmers

These 72 hour shipping warmers are best for three shipments.  Remain patient as these heat packs can take 60 minutes to start generating noticeable heat.  Uniheat shipping warmers are the first designed especially for small pets, tropical plants and other temperature sensitive products.  This duration of heat pack is a best seller among hobbyists and businesses whom need to control the shipping temperatures!  For best results it's important to open your shipping warmers well ahead of your intended pack out time.  This will give you amply time to make sure they activate properly.  During this time it's important to make sure your heat packs are properly staged as well.  We've found it's best to allow them to heat up in the shipping container you'll be using them in.  This will prevent your heat pack from coming into contact with any solid, cold surface which may cause your heat pack to stall out from heating up properly. Once you've noticed that the heat pack is warming it's important t