On the day of the fitting please make sure your hair is washed, preferably with a clarifying shampoo. A clarifying shampoo ensures all residues are removed. These residues must be removed as they can effect the bonds.
Try to leave your hair as natural as possible and do not apply any styling products.
Please come with your hair in its usual parting and straightened if possible. This makes it easier to see where the bonds are going to be applied.