The Bare kit contains neutral colors, the Dare kit has sultry colors and the Flare kit has bold colors.
Each kit is $36 and comes with 3 bases and the F70 eye shadow base brush.
Image via brigetteramos
Sigma's description of the bases:
"The eye shadow bases were made with a blendable, smooth formula to achieve a pigmented and long-wearing effect."
"Includes the F70 brush for an effortless and smooth application."
I first heard of these a few weeks ago after watching Glamourista16's YouTube video "Best New Eyeshadow Bases Ever?!" She gives an in-depth review and provides swatches of the bases. Definitely check this video out if you want to hear more about the bases and see what the colors look like on skin.
I am most interested in the Bare and Flare kits, especially the colors Pose and Strike, which look GORGEOUS.