A signature design feature of CFCL is applying a thin rib that is seamed straight on the center back. CFCL has two reasons why they apply this design feature to their minimalist clothing.
The first reason is to prove that the garment is a knit made by computer programming. Typically this pattern can't be created unless you use printing or embroidery.
The second reason is to reinforce CFCL's brand statement which aims to create clothes that are different. Standard designs includes stiff shoulders but CFCL uses a stretchy material which gives you a sense of freedom. The detailing on the center back is subtle but is an iconic design feature to CFCL clothing.