Forget about the fact that sometimes you can go to bed with wet hair. You should never do this if you have hair extensions whether it is hand weft extensions or machine wefts!
Since it is convenient for most girls to wash their hair before bedtime, it is essential to wait until the hair dries completely. Sleeping with wet hair results in unpleasant creases and a lack of volume. Besides, your strands may tangle while you sleep, which are very difficult to comb later.
In addition, it is better to fix the hair before going to bed. This is necessary so that during sleep they do not damage and tangle. The best option to keep your hair extensions safe from damage while sleep is to braid a weak braid or pull your hair into a ponytail.