A closure is hair attached to a small piece of fabric. The hair is ventilated through the material on the base of the closure by a ventilating technique knotted directly to the base. Due to the delicate nature of closures, it is important to take extra care to prevent damage in the from of balding. Balding is when hair becomes detached or thinned out on the bases giving it a bald-like appearance. Balding can be caused by brushing, combing, excessive tugging, scratching with fingernails, applying product directly on the closure, rough handling, or vigorous washing. Closures while mimicking a real scalp, they cannot be treated like a real scalp. You must handle with care.