Compression socks or tights can offer several benefits when worn during sleep, such as:

1. Improved blood flow: Compression garments can help increase blood flow and prevent blood from pooling in the legs, which can reduce the risk of blood clots and other circulatory issues.
2. Reduced swelling: Compression garments can help reduce swelling in the feet and legs, especially for people who are on their feet for extended periods during the day.
3. Alleviated pain: Compression garments can help alleviate pain and discomfort associated with conditions like varicose veins, restless leg syndrome, and plantar fasciitis.
4. Improved athletic performance and recovery: Athletes often wear compression garments to improve their performance and help their muscles recover after exercise.