This is a finely crafted yarn with gently twisted strands that look like delicate, soft rope.  It's bulky enough to knit up quickly, but lightweight enough to use for spring/summer garments.

Cotton Rope has been discontinued, so get it while you can. 

55% Cotton, 45% Acrylic.  Heavy worsted weight.  15 stitches = 4" on US size 10 knitting needles.