The TP 01 comes in a mid-weight twill, and the weave is what gives it structure. Substantial enough to hold its shape through a full day of wear, without losing the drape that makes it fall right. Comfortable enough to erase the line between the office and the couch, and sharp enough for either.
Pair it with the OS 01 Essence, made from the same fabric, and wear the two tonal or split them up across the rest of the wardrobe.