Sosum is a stabilized hyaluronic acid- (HA)-based filler with a very high cross-linking rate. High density and finely-packed molecular structure of the gel are achieved due to the Low-Temperature Stabilization Reaction (LTSR) technology. Sosum Dermal Filler Before And After have outstanding resistance to degradation meaning longer effect duration (up to 12 months!) as well as high elasticity and viscosity values, which ensure even distribution of the gel in the dermal layers. Zero levels of residual BDDE is achieved through a two-step purification process. Low injection force of the HA gel ensures uniform and painless distribution of the filler during the injection.