This is the Driftwood Tee from Interweave Knits Summer 2014. I made mine quite a bit longer, and I added some waist shaping. It's knit with a bit of positive ease since it's lightweight and the yarn drapes well. I wanted a little more detail at the top so I decided to add in a slice of the openwork pattern on one shoulder. I put it only one one shoulder to keep with the asymmetry theme. My quasi sleeves were a bit too wide and flared out too much so I scrunched them in using an edging of one row of single crochet followed by a row of reverse single crochet.
I love the yarn -- it's Batiste by knit One, Crochet Too. It's 50% merino/30%linen/20% silk, feels luxurious against the skin and has a mild tweedy look. This particular color is called "lipstick" and there's a good selection of colors. This may become one my favorite DK weight yarns. I think the sweater is wearable in all but the warmest summer days.