You will enjoy choice of one 20 inch micro fusion keratin bonds treatment from the selection half head 150 minutes 34 head 210 minutes full head 270 minutes micro fusion bonds are one of the safest hair extension methods on the market a keratin tip what your natural hair is made of is softened using a special tool that doesn39t get any hotter than your hair straighteners it is then rolled onto a small section of your natural hair bonding them together removal is si