Therapacks neck and shoulder heat packs are manufactured in Australia. They contain 100% natural lupin seeds. Lupin seeds do not germinate and do not grow mould when heated (and subsequently get exposed to moisture) like the traditional wheat bags are prone to. This extends the life of the heatpack with no funky smell like you get from wheat. You can microwave or freeze these packs. These are the only packs we use in our clinic and they’ve lasted us 10 years of constant repetitive use. The unique “U” shape enables this pack to sit comfortably on the shoulders, but it’s also a great shape for hip and lower back pain, as well as abdominal pain from period pain, labour pain or indigestion.