Intertwine is seamless, but is worked in two pieces- the top and short sleeves are worked in the round, from the top down, in one piece. The bottom is worked in the round, from the bottom up, in one piece in a simple lace pattern. The two pieces are then joined using the Three Needle Bind Off method.
The sample shown was knit in Primo fingering by The Plucky Knitter, shade Bleu.
Gauge: 24 sts and 32 rnds = 4" in Stockinette Stitch.