Packability measures how well a fabric rolls, folds, and recovers from compression in a suitcase or backpack without creasing. Normalised 0-1: polyester (0.95), merino (0.90), silk (0.85), jersey (0.85). Low packability: canvas (0.55), linen (0.60), denim (0.55). Packability is weighted +0.3 in FashionFactory scoring for travel, backpacking, and hiking contexts.