Amy Elliott Dunne (Rosamund Pike) may be a runaway wife, but she takes care of herself in any situation. After dying her hair, she buys Salon Selectives shampoo and conditioner. The shampoo is Level 5, as shown by the green metallic band on the red bottle, which indicates a balanced cleansing level for normal healthy hair. The conditioner is Level S, which indicates a daily treatment for smoothing and taming frizz from sleek silky hair.