The formula is supposed to be "saturated pressed glitter eye shadow" that have "endless, shifting depth and dimension" that is designed to be applied with fingers. These are most definitely for the glitter lovers, and if you love a duochrome, then these might have your name stamped all over them. For as glitter-packed as the formula was, they felt smoother and nowhere near as dry/loose to the touch as a lot of glittery eyeshadows feel. I would describe the formula has medium, buildable coverage that applies best with fingertips or a dampened brush. I would recommend using a glitter adhesive to maximize the hold over time, though these had nowhere near the fallout that I'd have expected--there was definitely more to the formula that helped the product adhere to bare skin and not succumb to gravity immediately. On their own, they creased faintly by the sixth hour of wear, had light fallout, but I kept them on for a good 10 hours, and there was additional fallout but still a significant amount of glitter stayed on my lid.
There wasn't anything in the product description that refers to them being used wet, but they seemed to apply slightly better with a dampened brush and had more hold using an adhesive spray/glitter glue (Fix+ helped minimize the fallout but not quite as well as a tackier glitter adhesive). This is one of those products that definitely looks more interesting and complex in person as all of the various pearls and glitters reflect and dance with the light. They did have a lot of dimension, shift, and depth as promised.
If you expect to use these dry and need to see zero fallout throughout the day, these won't win you over. If you like tons and tons of sparkle/glitter and don't mind a bit of fallout (or else are comfortable using a fixing spray or glitter adhesive), they're really gorgeous in person.
The average rating based on all reviewed shade(s) in this formula is shown below.
A total glitz blitz: high-intensity, ultra-saturated, pressed glitter eye shadows created for major holiday sparkle. M·A·C's Shiny Pretty Things Shadow are mix of glitter, shimmering pearls and glittering glass bead pigments create the look of endless, shifting depth and dimension. Specially designed in shiny pretty metallicized packaging.