The “cupid’s bow” is the double curve of the upper lip, resembling the bow of Cupid, the Roman god of love. The upper lip is believed to be most attractive when it is well-defined and when the two sides look the same. Everyone’s facial structure is different, and so is everyone's ideal lip shape and size. Restylane Silk is designed to provide precise lip shaping and line control, resulting in silkier, smoother lips and natural-looking results.