If fine garments are donned for one’s own pleasure, it is permissible. But it is not permissible to dress for tafaakur (pride and pomp). The sign by means of which the two conditions (personal pleasure and pride) can be distinguished is the person’s attitude in privacy and public, namely, he wears fine garments at all times, then it indicates refinement of disposition.
Thus, there is nothing wrong when such a person dons fine apparel. In contrast, if in privacy a man dons inferior garments, while in public he dresses gaudily with fine dress, then this attitude displays tafaakur (pride), which is haraam.
Ummati Islamic Website