What is fitting shell in dressmaking?

A fitting shell in dressmaking is a basic, unembellished garment pattern that serves as a template for fitting and adjusting the fit of a design on a dress form or model. It typically includes essential elements like the bodice, sleeves, and often a skirt, allowing designers to assess how the fabric will drape and fit without distractions from details like seams or finishes. Once the fitting shell is perfected, it can be used as a foundation to create more complex garment designs.