It depends. If you have naturally curly hair, the curls do not fall. The styling product and technique used may elongate the curl, but the curls are there to stay. If you have a "texturized" (or textured) wig, that means the hair was processed to have a texture that differs from the natural texture of the hair. These curls usually last the life of the wig, depending on how well the wig is cared for.