Frame: Cobalt
Lens: Red Iridium

Simply a smaller lens when compared to the regular squared model and not as squared (see pics). Designed for smaller faces or women. Perfectly designed for sand volleyball, because they are well balanced and very light in weight, while blocking the sun from above and the sides.

Frame: Matte Black
Lens: Black
Got these as a replacement for the older style 0.4 squared's with the Hammerfang earstaems. Super strong, light, and flexible.

Frame:Glitter Gulch
Lens:Gold Iridium

Just bought some of these, and I am very impressed.
The temples are mirrored instead of opaque like on the original 0.4 and it seems to make a big difference visually.
Gold Iridium lens making everything brighter/sharper and with Glitter Gulch it is a awesome combo.