**currently out of stock** we recommend the OPI Start-To-Finish Start-To-Finish Formaldehyde-Free https://www.lesalondieppe.com/product-page/opi-start-to-finish-start-to-finish-formaldehyde-free for now. Nail Tek Hydration Therapy is available is four formulations. Each of the Hydration Therapy formulations provides effective nail therapy for specific nail conditions. As the condition of the nail changes, there is a different Hydration Therapy formulation to meet each individual need. Hydration Therapy III is for dry, brittle nails.