Q1. How many bundles of jumbo ultra braid do I need for a full head?A: For average head size, a full head needs 2-3packsQ2. Will the hair shedding or tangle?A: It will not shed or tangle.Q3: Is the hair heat resistant fiber? A: It is real 100% heat resistant fiberQ4. How long does it last?A : How long the hair lasts depends on how you maintain it.Treat it like your own hair and take very good care of it, then normally it could last longer than 1 year.