Solotica is available in 5 different series: Solotica Hidrocor, Solotica Natural Colors, Solotica Hidrocharme, Solotica Solflex, and Solotica Hidrocor Monthly.
Solotica Hidrocor and Solotica Hidrocor Monthly are exactly the same; the only difference is that the latter are monthly lenses, while Solotica Hidrocor are yearly lenses. The Hidrocor series comes without a limbal ring or border.
Solotica Natural Colors and Solflex are also exactly the same, with Solflex being monthly lenses and Solotica Natural Colors being yearly lenses. The Natural series features a soft limbal ring or border.
Solotica Hidrocharme is only available as yearly lenses and comes with a pronounced limbal ring or border.
Solotica's Hidrocor series is by far the most popular. The colour Quartzo is actually the best-selling colour worldwide. Recently, other colours such as Mel, Ocre, Cristal, Topazio, and Ice have also become extremely popular.
The Solotica Natural Colors series is also popular. More and more people are choosing the Natural series because it doesn't create as dramatic a change as the Hidrocor series.