3am Musings -
NZ Fabric Guides, Sewing Tips and Preorder News

Two fabrics can both say: 95% cotton / 5% lycra but behave completely differently because one is rib knit and one is French Terry.

While different types of knit fabrics often have the same fibre content (95% cotton, 5% spandex) they behave very differently, and choosing the wrong one can completely change the fit and feel of your finished garment.