The Matrix Biolage HydraSource Mask is lavish mask designed to instantly soften and protect the hair whilst providing intense moisture. Infused with Aloe and Passion Fruit, it's made to be applied to wet hair after washing for a long lasting effect. You'll be left with super silky, supple locks with a stunning shine. K.D. Directions for use: After Matrix Biolage Hydrasource Shampoo, massage Matrix Biolage Hydrasource Mask into wet hair and leave in 3-5 minutes. Rinse. Use once or twice weekly in place of Matrix Biolage Hydrasource Conditioner. In case of contact with eyes, rinse them immediately.