It's called the Sunki Dress and there are so many chic details like the overlap on the shoulder, the cool side panel pockets and the top stitching. It seemed a little intimidating at first, but it's really not too hard.
The only real challenge I had was the side panel, but there are lots of hints and tutorials online with additional photos and instructions to help clarify. I found this one by Figgy's and this one by Charm Stitch to be the most helpful.
The fabric is by Jo Morton, not really sure what it is but it reminds me of fireworks. I think the heathery gray leggings with gold metallics dots look sophisticated and festive with it. My only complaint is I that have to wait until my little 11 week old baby girl is 18 months so she can wear it!!
The little leggings sewed up in like half an hour, which was surprising. All I needed were a ball point (jersey) needle for the sewing machine, and a walking foot, which if you quilt you already have. Okay, there is a third thing, but most of you probably already have it, the capability to sew a zigzag stitch on your machine. There is an actual specialty stitch for sewing knits that's similar to a zigzag, but my machine doesn't have it and the zigzag stitch worked just fine.
You can also check out this wonderful YouTube video tutorial by The Crafty Gemini that goes over sewing with knits and shows you why you need the walking foot and why you use a zigzag type stitch.