" In like manner also, that women adorn themselves in modest apparel, with shamefacedness and sobriety; not with broided hair, or gold, or pearls, or costly array; But (which becometh women professing godliness) with good works." (I Timothy 2:9- 10)
While the Bible only specifically addresses the need for women to dress modestly, the same teaching would apply to men in principle. Both men and women should bring glory to God in their manner of dress.
" Tell the believing men to lower their gaze and be modest. That is purer for them. Lo! God is Aware of what they do. And tell the believing women to lower their gaze and be modest, and to display of their adornment only that which is apparent, and to draw their veils over their chests, and not to reveal their adornment." [Holy Quran; Surah Al Nisa 24: 30]