Hi All. I find those yarn braids to be so cute. I would pre-cut the length of the yarn in advance to save time. I plan to put those in my sisters hair soon. She wants something that will last through a Michigan summer. Does anyone know how safe the yarn is to use in the hair? They look pretty but I wonder how safe the fibers will be for the hair strands. In regards to the fibers cutting or causing damage. Expect Great Things!