This article explains the one-piece tracksuit trouser pattern, a simple and loosely structured construction used for casual, sports and functional garments. It outlines its main characteristics, typical fabrics and waist positioning.
The text details the measurements required for drafting, focusing on hip width and seat rise, and explains how all other dimensions are derived. Differences in proportions and drafting logic compared to more tailored trousers are clearly described.
Special attention is given to horizontal and vertical ease, their relationship and their influence on the rise, crotch and leg opening. The article also clarifies grainline placement and explains why this pattern is suitable for both male and female morphologies.