It is used for heat therapy and pain relief for ailments like muscle cramps, arthritis, and backaches. 

The bag is made of durable rubber, designed to be leak-proof and retain heat for a long time. 

It is a non-electrical, traditional method for applying warmth. 

Size: 30x18cm

Users are advised to fill it with hot (not boiling) water up to two-thirds capacity and check for leaks before use.