Over the last year or so I posted several of these old Botany ads:
click to enlargeVintage tailors and suit companies knew that the fabric, though not the most important element, is vital when it comes to suit appearance. Why?
Heavier fabrics not only last longer than light-weight materials and help keep the wearer warm but they also add body to the suit and drape much better than light fabrics. What is drape? Drape is the name for how a material hangs and folds off of the body. Denser fabrics like those found in the days of old crease less easily and hang more elegantly than more modern light-weight fabrics that tend to fold and wrinkle.
Dense fabrics are hard to find today and modern fabrics equal in weight and quality to vintage fabrics are rare. Avoid "Super" fabrics (Super 100s, Super 120s, etc) as they are very thin with little body and tend to shine with wear and dry cleaning. The higher the "Super" number the lighter weight the fabric. Such 'miracle' materials are the trend nowadays but do not drape well, wear out quicker and are, quite frankly, cheaper quality than vintage fabrics.