You may have never thought to look for side-seams when shopping t-shirts before, but now that they've been brought to your attention, you won't be able to unsee them. It's really nothing complicated –– side-seams are simply the stitching that runs down the sides of a t-shirt, from the underarm area to the bottom hem.

What does tubular shirt mean?

Tubular t-shirts are constructed without the use of side seams. They require less sewing, are generally created using a single piece of cloth, and are less expensive to manufacture. While it costs less to manufacture tubular tees, they are not as fashionable or figure-flattering as side-seams t-shirts.

What does tubular mean in fashion?

: a woven, knitted, or braided fabric made in circular seamless form jersey is usually knit as a tubular fabric tubular fabric for pillowcases.