| 摘要 |
A cushion (1) includes a flexible cover (2) defining a chamber (15). A water-absorbing material (3) is placed inside the chamber, upon absorption of water the water-absorbing material being suitable for heating by means of microwaves. The cover has a sealable feeding mouth (4) so that water may be poured into the chamber. The water-absorbing material is a powder material of super absorbent polymer (SAP). The flexible cover is made from a polymeric film covered with a textile. A check valve is provided in connection with the feeding mouth.
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