Peter Thomas Roth Instant FIRMx Lip Filler instantly plumps, smooths, and hydrates lips while reducing the look of lip lines over time. Infused with 2% LineFill™ for immediate fullness, 1% Maxi-Lip™ for enhanced volume, and 3% Hyaluronic Acid Filling Spheres, this lip treatment delivers soft, supple, and youthful lips.