Hello! My name is Jessica, I am a physician assistant, and one of the providers at Aesthetic Skin - Winnetka & Chicago. This is a great question. Given your age, slim build, and the presence of stubborn static accordion lines that haven’t responded well to CO2 laser treatments, Sculptra or Morpheus8 could both be excellent next steps, depending on your goals and skin type. Since these lines are static (meaning they’re visible even when your face is at rest), they’re typically a sign of volume depletion and collagen loss—common in leaner individuals as the fat pads in the face diminish over time. Sculptra could be particularly beneficial in your case because it works gradually to stimulate your body’s own collagen production, helping to rebuild the structural support beneath the skin and improve overall texture and firmness. It doesn’t “fill” lines in the way traditional fillers do, but it improves the skin’s quality from the inside out, making it ideal for diffuse, etched-in lines like accordion wrinkles. On the other hand, Morpheus8, which combines microneedling with radiofrequency, can also improve skin tightness and texture by targeting the deeper layers of the dermis and boosting collagen and elastin. This can help smooth the appearance of fine lines and crepey skin, though it typically requires a few sessions and is best for mild to moderate skin laxity. If your primary concern is texture and skin quality rather than volume loss, Morpheus8 might be the better choice. However, if the issue is more structural and due to thinning tissue, Sculptra may offer more long-term improvement, especially when combined with a collagen-supportive skincare routine. Some patients even benefit from a combination of both treatments for comprehensive rejuvenation. I hope this helps and best of luck!