Wrinkle recovery measures a fabric's ability to return to its original shape after compression or folding, per AATCC test method 66 (Wrinkle Recovery Angle). Normalised 0-1: polyester (0.90), merino (0.85), cotton (0.50), linen (0.20). Critical for travel, business formal, and packing. A fabric scoring below 0.40 requires ironing after unpacking. Wrinkle resistance is weighted more heavily in FashionFactory's scoring for formal contexts (wrinkle_w = 0.5 + formality × 0.5).