Gatineau DEFI LIFT Active Firming Serum 30mlA concentrated serum that delivers exceptional, clinically proven results. The lightweight, hydrating formula firms, lifts and tightens the appearance of slackened, sagging skin. Formulated with Tetrapeptides and Deep Ocean Bacillus Ferment, this high performance serum provides immediate and long lasting results to leave skin looking firmer and more elastic, with a visibly smoother, more defined appearance.