It may be now asked, whether the Apostle wholly condemns the use of gold in adorning the body. Were any one to urge these words, it may be said, that he prohibits precious garments no less than gold; for he immediately adds, the putting on of apparel, or, of clothes. But it would be an immoderate strictness wholly to forbid neatness and elegance in clothing. If the material is said to be too sumptuous, the Lord has created it; and we know that skill in art has proceeded from him. Then Peter did not intend to condemn every sort of ornament, but the evil of vanity, to which women are subject. Two things are to be regarded in clothing, usefulness and decency; and what decency requires is moderation and modesty. Were, then, a woman to go forth with her hair wantonly curled and decked, and make an extravagant display, her vanity could not be excused. They who object and say, that to clothe one’s-self in this or that manner is an indifferent thing, in which all are free to do as they please, may be easily confuted; for excessive elegance and superfluous display, in short, all excesses, arise from a corrupted mind. Besides, ambition, pride, affectation of display, and all things of this kind, are not indifferent things. Therefore they whose minds are purified from all vanity, will duly order all things, so as not to exceed moderation.
Jean Calvin, Comentariu pe 1 Petru 3:3
The outward adorning of the body is very often sensual and excessive; for instance, when it is immoderate, and above your degree and station in the world, when you are proud of it and puffed up with it, when you dress with design to allure and tempt others, when your apparel is too rich, curious, or superfluous, when your fashions are fantastical, imitating the levity and vanity of the worst people, and when they are immodest and wanton. The attire of a harlot can never become a chaste Christian matron.