Plump your pout to its fullest, flirtiest most fabulous shape and size with NYX Professional Makeup's shimmering Pump It Up Lip Plumper formulated with Maxi-Lip. Maxi-Lip is a special peptide that has been infused into this improved formula. Peptides are known to improve collagen synthesis which can lead to firmer, fuller smoother looking lips. Go ahead. Pout about it.