It is important to practice on an empty stomach (not less than four hours from a big meal and about two hours from a light meal). You can drink half an hour before and it is better not to drink at all during your practice. After the practice, you should wait forty minutes before drinking (your internal organs have to return in place).
Wear comfortable clothing neither too tight nor too large, better if made of organic cotton. We practice with bare feet but a pair of sox are useful during relaxation. You can bring with you a soft and light blanket.
In respect of yourself, your friends and your yoga teacher we recommend to have a shower before practicing. Hot water helps your muscles to become more flexible and you can feel more relaxed.