A packaged product, such as a thermo-formable splinting or bracing product adapted to be heated by microwave energy, which packaged product comprises a water laden absorbent material (5), optionally sealed in a first water-impervious container (6), wherein said absorbent material (5) is adapted to permit microwave energy to enter and heat the water held in the absorbent material (5), the first container (6) being microwave transparent and the product to be heated and the absorbent material are disposed adjacent each other but are separated by a water-impervious barrier.