Includes 6 replacement heat packs for the Snuggle Puppy. Heat packs are safe for pets and people alike, stay warm up to 24 hours, are all natural, disposable, and odorless. Don't need it for the full 24 hours? Simply reseal the pouch in an airtight bag after opening for later use. The average temperature for the heat packs runs 126F-144F (52C-62C).