The properties of the hyaluronic fillers, Juvederm and Restylane and their denser formulations Juvederm Ultra Plus and Perlane, make them very popular. They are soft and malleable, easy to inject so placement is more precise, and if you don't like the look, they go away in a reasonable amount of time. I, and most of my colleagues, generally turn to Juvederm for lips simply because it is so soft. But that is for the lip "body" - you can easily use Perlane or Restylane above the lip to achieve some very pretty results without even injecting into the lip itself. Often combined with a tiny enhancement of the philtral columns. One of my favorite techniques is to place filler in a way that causes a little bit of lip eversion. In that case you can show more of your own lip and often entirely skip the lip body injection. The lip body itself is like a sponge, so any material injected can cause you to feel the differences in product take-up in the various little chambers in the lip tissue since the mucosal lining is so thin and sensitive to variation. Although your outer lip looks smooth, you can sometimes feel a little of the filler from the inside. Certainly properly placed filler will look natural and even when kissing, you shouldn't feel like there is anything there. Under they eyes? For the most part, I'd say Restylane or Juvederm. If you have very light skin, Juvederm can cause a slight bluish tint, so for the very pale, Restylane is probably better. Stay away from the dense fillers or permanent fillers. Evolence is gone - it was a great product and wonderful to support drooping mouth corners. I hope it comes back, but for now it's not available. Naso labial folds? Perlane, Radiesse, Juvederm Ultra. Because the injection depth is different, you can use dense products in this area. Sculptra used for volume correction higher in the face can often offset the need for fillers in the nasolabial folds.