Obagi Elastiderm NECK AND DECOLLETE Lifting ConcentrateA powerful triple threat concentrate of patented Bi Mineral Contour Complex, a smoothing Retinoid, and brightening Alpha Arbutin to target signs of skin aging for firmer looking, more resilient skin on the neck and dcollet. ELASTIDERM Neck and Dcollet Concentrate supports skin elasticity and visibly improves horizontal neck lines, fine lines, skin sagging, crepiness, and with noticeable results in as little as 8 weeks*. Full results at 12 weeks.