Refers to something that can be tailored or adjusted.
El vestido es entallable, lo que significa que se puede ajustar perfectamente a la figura de cada persona.
The dress is tailorable, which means it can fit perfectly to anyone's figure.
La tela era tan entallable que se ajustaba perfectamente al cuerpo de la modelo.
The fabric was so tailorable that it fit perfectly to the model's body.