Poly-L-lactic acid (PLLA) is a biocompatible, biodegradable, synthetic polymer used primarily as an injectable dermal filler to stimulate natural collagen production. Unlike traditional fillers, it does not give volume but it provides gradual, long-lasting, and natural-looking volume restoration for facial wrinkles, lipoatrophy, and skin rejuvenation. PLLA is also used for body contouring and treating skin laxity. PLLA is now also used in high quality Threads, so you don't only benefit from mechanical lifting but also you get a better skin quality from these thread treatments.