Fabric choice directly determines how a garment falls and how long it lasts. Weight, fibre composition and finishing are the three main headings.
Weight determines the mass of the fabric and therefore its drape. Two fabrics with the same composition produce completely different products at different weights.
Fibre composition affects breathability, shrinkage and dye uptake. Finishing determines how the fabric behaves after washing.
Always request a sample and run a wash test before you decide.