Four-way stretch

A fabric property meaning the material stretches both along and across the grain, useful for fitted costumes that need to move with the body.

Four-way stretch describes a fabric that gives in two directions at once: along the length of the cloth and across its width. This is different from two-way stretch, which only yields in one direction. The property comes from elastic fibres woven or knit into the material so that pulling it any way still lets it snap back to shape. For cosplay, this quality matters most when you are making form-fitting pieces like bodysuits, leggings, or armour underlayers, because the fabric moves with you rather than pulling tight or bunching when you bend and reach. Knowing whether your fabric has four-way stretch before you cut helps you choose the right pattern and avoid a costume that restricts movement on the convention floor.