[Problem to be Solved]To prevent curling of wing-shaped flaps to reduce an unnatural fit.[Solution]At least a part of the outline of a wing-shaped flap W has a wavy or curved line or wavy and curved lines in combination. A plurality of dot embosses 22 are provided on an outer edge along the outline of the wing-shaped flap W. Moreover, functional embosses 23 relatively larger in area than the dot embosses 22 are provided at the positions of convex portions 20 where the outline of the wing-shaped flap protrudes outward. Furthermore, central embosses 24 relatively larger in area than the dot embosses 22 are provided in a region where the dot emboss 22 is not provided, at the center of the wing-shaped flap.
