Eco-stitch 100% linen
I knit from the bottom up starting with a mesh stitch as a border. Linen yarn lends itself very well to mesh stitches. It looks much better than standard ribbing.
The front and back are a little shaped in towards the waist.
I didn't really follow a pattern but there are plenty of patterns on ravelry, which you can adapt, for example, the Ombre Tank pattern. I had to place the colour blocks strategically so I wouldn't need more than the 4 hanks of yarn (2 in the plain blue, one of each of the mottled shades).
With linen you need to make your garments with a little positive ease, i.e. they need to be not too close fitting. This will show off the beautiful drape in the finished knitted fabric.