BENEFITS Hydration Stronger Hair Shine Volume Luxurious overnight age-corrective leave-in hair serum for aging hair. +92% more strength * 450°F heat protection* Increases hair fiber diameter by +5.7%* -66% frizz* +32% shine* *Instrumental test after 1 use of Overnight Youth Serum @media only screen and (max-width: 767px) { .c-product-main__info, .c-product-promotion, .c-section__title, .c-section__description.h-text-align-center{ text-align:left !important; } .c-section__headings.h-text-align-items-center{ align-items: left!important; display: inline; } } .c-accordion.m-secondary .c-accordion__title { padding-left: 0px! important; padding-right: 0px! important; } .c-accordion__content-inner { padding-left: 0px; padding-right: 0px; } .c-product-table-compare__cell-label { font: 800 .75rem/1.3 Avenir-Heavy,sans-serif; text-align: center!important; text-transform: uppercase; } .c-product-table-compare__body tr:nth-child(5), .c-product-table-compare__body tr:nth-child(2) .c-product-table-compare__cell-label.h-text-align-left.h-color-text-secondary{ display: none; } [data-js-section-id="pdp-section-comparisontable"] h2 { border-top:1px solid #d8d8d8; padding-top: 1.25rem; text-align: center! important; } .c-product-table-compare__cell { text-transform: unset; font-weight: unset;} @media only screen and (max-width: 767px) { [data-js-section-id="pdp-section-comparisontable"] h2 { text-align: left! important; } } .c-scrollable .c-scrollable__arrows.m-background-light .c-scrollable__arrow-next, .c-scrollable .c-scrollable__arrows.m-background-light .c-scrollable__arrow-prev { background: transparent; box-shadow: none; } .c-product-table-compare.m-secondary .c-product-table-compare__cell { padding: 10px 10px 0 0; } | YOUTH REVITALIZING CARE. ​ WAKE UP TO VISIBLY FULLER, SMOOTHER, HEALTHIER HAIR* An overnight age-corrective leave-in serum infused with Pro-Xylane™ and Ochrophyta Algae. This luxurious leave-in formula reverses the 5 signs of hair aging. It deeply hydrates, smooths, and builds body from root to tip while providing 450°F heat protection. To maximize the results, combine with the rest of the Chronologiste range *USING FULL CHRONOLOGISTE SYSTEM OF BAIN, MASQUE+OVERNIGHT SERUM