Sheer or opaque? The answer depends on the weather, the occasion, and your outfit. Here is a quick decision framework based on the denier number printed on the package.
Sheer tights let your skin show through and add polish without bulk. They work best for formal events, warm offices, and outfits where you want a clean leg line. The trade-off is delicacy: lower denier means higher snag risk.
This is the most versatile range. The leg is covered but not heavy, making it appropriate for offices, dinners, and everyday wear in spring and autumn. If you own only one pair of tights, make it a 40-denier black pair.
Opaque tights cover the leg completely and provide real warmth. They are ideal for winter, casual outfits, and any look where you want tights to read as a deliberate layer rather than barely-there hosiery.
Match the denier to the season and the occasion. When in doubt, 40 denier in black is the safest choice for most adult wardrobes.