Welcome to Zen Bear Heat Packs!.. Here you will find Handmade Heat Packs made in Darwin Australia. Original designs aimed at providing Heat Therapy for aching Backs, Hands, and Menstrual Cramps. Making life a little bit easier for pain sufferers one thread at a time! Made with your comfort and safety in mind. Thank you for visiting Zen Bear Heat Packs! and we hope you find something you like.