Thank you for your question about Restylane Defyne and Refyne. Because there is no filler that is "one size fits all", injectable HA fillers come in many formulations and cross-linkages. This means we have access to fillers that are thicker and more sturdy (Voluma, Lyft) to support the midface and help revolumize those areas...as well as those that are very smooth more liquid to use in areas such as perioral lines and lips. In between the "thick" and "thin" fillers your have several other levels of cross linkage. Restylane Defyne and Refyne fall in this middle area. Defyne is bit thicker than Refyne, and is good to treat areas of the face that animate frequently but need correction. Refyne is a bit smoother/softer than Defyne and can refine more superficial lines. Both of these products will maintain their structure, but allow for very natural movement of the face. To be sure, see two or more experienced, licensed and board-certified providers in your area for a complete evaluation to make sure you are a good candidate and that it is safe for you to have treatment. I hope this helps.