Each Winx starts in her Believix form, then they pose a specific move from the Believix transformation. She then shouts, "Winx Lovix" and then her Lovix power. Finally, she appears on the screen in her Lovix outfit.
Lovix consists of wintery versions of their Believix outfits, with the clothing covering more skin and outlined in fur-like fabrics. The wings are jewelled, have no designs or sparkles, and glow around the edges. When the Winx and Roxy were trapped in the Major North Fairy Aurora's palace, the Winx were in Lovix form and protected from the cold, as demonstrated when Roxy began to freeze to death because she did not have a Lovix. The glow on the wings are presumably what keeps them away from the cold.