Rabbits need bedding that is safe, comfortable, and absorbent. Here are some types of bedding that are commonly used for rabbits:

1. Hay: Hay is a common bedding choice for rabbits because it is readily available and provides them with something to nibble on. It is also absorbent and helps to control odor. Timothy hay is a good choice because it is soft and does not have sharp edges that could injure your rabbit.

2. Paper-based bedding: Paper-based bedding is absorbent and easy to clean. It is made from shredded paper, such as recycled paper or newsprint, and is often sold in pellet or crumbled form. This type of bedding is low-dust and can be good for rabbits with respiratory problems.

3. Aspen shavings: Aspen shavings are made from the wood of aspen trees and are a good choice for rabbits because they are absorbent and do not contain the aromatic oils found in pine or cedar bedding, which can be harmful to rabbits.

4. Straw: Straw is a less common bedding choice for rabbits because it can be prickly and uncomfortable for them to sit on. However, it is absorbent and can be used in combination with other bedding materials.

5. Fleece liners: Fleece liners are washable and reusable, making them an eco-friendly option. They are soft and comfortable for rabbits to sit on, but they may not be as absorbent as other types of bedding.

When choosing bedding for your rabbit, avoid materials that are dusty, such as cedar or pine shavings, as they can irritate your rabbit's respiratory system. Also, avoid using clumping cat litter, which can be harmful if ingested by your rabbit. Change the bedding in your rabbit's living space regularly to maintain a clean and healthy environment.