Say goodbye to weak and fragile hair with Biolage Advanced Recovery Deep Treatment Pack Hair Mask. The newest addition to the much loved Biolage Deep Treatment Pack hair mask collection. Make your hair stronger and ready for the day with Biolage Advanced Recovery Deep Treatment Pack Reviving Hair Mask designed to gently revive damaged, over-processed hair and give it the boost it needs. Enriched with amino acids, Use up to twice a week alongside the Advanced KeratinDose haircare collection.