What sets the Savannah Muscle Tank apart is the center back seam detail: Box-stitch with wide inverted box pleat at mid-back. It’s all about ease and comfort contrasting the edgy boxy shape. Crew neck, low armholes, high-low hemline with side slits, the Savannah is all about confidence. I can. Slub cotton is spun with variable tensions to create a luxurious horizontal striping texture.