Restylane is a hyaluronic acid (HA) based filler from Galderma. Similar to how Allergan has its Juvederm line of products, the Restylane family includes Restylane, Restylane Silk, and Restylane Lyft (formerly known as Perlane).  Restylane is an ideal filler for the tear trough area because of its thickness and fluidity of injection.  This makes it one of our most requested fillers as it does the best job for the tear trough area.  It tends to pull in less water than Juvederm Ultra XC.  We use this to our advantage in the tear trough because it is less likely to lead to prolonged swelling and lumpiness in the thin skin of the tear trough (the area between the eye and the nose that can appear deep or hollow).