The Isosceles Shirt is cut as a T shape, with horizontal shoulders and very wide sleeves.
Once the sleeves are fastened to the body, the machinist sews a straight line from the top
of the shoulder to the cuff, angling the shoulder and tapering the sleeve. The resulting flap is pressed flat and sewn down along the edges, creating an isosceles triangle with its apex at the neck and its base at the cuff. Large pockets are sewn at the front and the sleeves are finished without openings, so that this style works well as a lightweight jacket.

Tattersall cloths are named for Tattersall's horse auction, founded in 1766 at Newmarket,
England. The check pattern of yellows, greens, and blues over a cream ground was originally
used for horse blankets, but became a popular fabric for waistcoats, and later for shirts,
often made from a mix of wool and cotton. Wool Stripe Cotton Tattersall is an original
interpretation of a classic tattersall: the ground is an ecru all-cotton herringbone, with
alternating weft stripes of blue, green, and yellow coarsely spun wool.

Dyer's weld, Reseda luteola, is native to Europe and Western Asia, and has been used as a
source of yellow dyes since at least the 1st Century BCE. It was used extensively by the
Ancient Romans, especially for festival clothing, and the robes of the priestesses of Vesta,
the goddess of the hearth, whose flame the yellow fabric represented.
Depending on the dyeing process weld can deliver shades between a drab mustard to a
bright lemon.

When the fabric is rotated 90° in cross cutting, the subtle herringbone becomes horizontal, and the bolder wool stripes run vertically.

Fabric is cut sideways, and sewn in USA with 100% cotton thread. Galloons are fastened with custom-made oversized black 'jigger' buttons, flat two-hole buttons designed to support a more decorative button from behind a soft fabric.