Your Silk’n Silhouette comes with a bottle of Slider Gel. It is essential that you apply a thin layer of gel to your skin before starting the treatment. In addition to its hydrating function, this water-based gel also acts as a conductor. The gel ensures that Silk’n Silhouette effortlessly glides over your skin and prevents your skin from reddening or becoming too hot. The Slider Gel can also be purchased separately.