1Gentle formula, without adding heavy metals and peroxides, no damage to the scalp 2Safe and no irritation, quickly cover the hair root color difference, solve the troubles after hair dyeing 3Simple to operate, just spray it on the thin area of hair, naturally blend with the existing hair 4Easy to clean without residue, light and no greasy feeling, no pungent smell 5Convenient and fast, get rid of the tedious traditional hair dyeing, no side effects