You can make your bathtub comfortable by using a bath cushion. Bathtub cushions are soft and comfortable objects kept inside a tub for a comfortable and spa-like experience. They come in a wide variety ranging from headrest and neck support to full-length styles. You can go for padded and inflated cushions as per your preferences, and the comfort level required. There are plenty of other varieties. However, make sure the type you get is compatible with the bathtub. Go for the one that fits the bathtub well.