Whitewater rafting is an exciting and fun water activity, but safety is always the most important thing. Although it is not recommended to go whitewater rafting without a life jacket, if you must do it under special circumstances, the following safety measures can be considered: 1. **Choose the right water area**: Make sure to choose a flat, non-dangerous water area for rafting, and avoid rapids and dangerous reefs. 2. **Familiar with the water conditions**: Understand the water conditions, depth and potential dangers in the rafting area in advance. 3. **Rafting in a group**: Do not raft alone, make sure there are others with you and keep in line of sight. 4. **Everyone masters basic water skills**: Make sure you and your companions have a certain swimming ability and are familiar with the rules of behavior on the water. 5. **Wear appropriate equipment**: Although you do not wear a life jacket, you must wear suitable waterproof clothing and non-slip shoes to ensure that your body is warm and protected. 6. **Avoid alcohol**: Avoid drinking before rafting to stay alert and responsive. 7. **Master rafting skills**: Learn how to keep your body balanced in the water, how to fall into the water correctly, and how to swim. 8. **Know the distress signals**: In the event of an accident, make sure everyone knows how to send out distress signals. 9. **Carry safety equipment**: If possible, carry flotation equipment such as air cushions, buoys, etc. in case of emergency. Of course, the safest choice is always to wear a suitable life jacket. Before engaging in any water activities, make sure to follow local safety regulations and recommendations.