【Seat Cushion - MIXFILLING Foam Technology】Size: Back Cushion-22"X17"/Seat Cushion-17"X17". Even with frequent use, it stays securely in place. Note: Back cushion utilizes ties to stay in place. 【Never Flattens or Thin Out】Retains its shape even after multiple uses, providing consistent and comfortable support no matter how long you use it.
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