If you have attached your hair properly, it will not fall off. However, there can be certain situations in which you may need to prepare differently. For example, if you're going to be in the hospital, we recommend using grips instead of clips because they are more comfortable to sleep in and they are not made of metal, so you don't have to worry about having x-rays with them on. At PK Walsh, we teach our clients how to wear and live in their hair. Be sure to discuss your particular situation so that you can be properly prepared.