More important than anything is the construction of the suit.
A well skilled tailor using their techniques can make an ordinary fabric seem extraordinary.
If you’re new to tailored suits, then you will learn about the construction of a suit. There is a difference between fully-fused, half-canvas, and full-canvas suit jackets may be as foreign to you.
The canvas on a suit is a layer of interlining that can be found between the outer wool fabric and the inner lining of a jacket.