Yes you can, using a plastic cap is just a bigger baggie, I use this myself because I have a braided weave in now and can't wear the phonytail.Bees said:I, too am a new member of this forum. I am having a ball trying to absorb all this information. Question about the baggie method...I usually wrap my hair at nite and roll the ends up with Mango Butter in the morning before taking a shower. I have been doing this for the last few months in an effort to keep the flat irons out of my hair. Could I also wrap my hair at nite and sleep with a plastic cap on?