Denier is a unit of measurement indicating the fiber thickness of individual strands used in the construction of hosiery and tights. A lower number signifies finer, more sheer material, while a higher number indicates a thicker, more opaque fabric. For example, hosiery with a 15 denier rating is generally considered very sheer, whereas 80 denier tights are considered opaque.
The denier rating directly impacts the durability, warmth, and appearance of legwear. Lower denier products are more susceptible to snags and tears but offer a lightweight feel suitable for warmer weather or formal occasions. Higher denier products provide increased resistance to damage, greater warmth, and a more solid color, making them appropriate for colder climates and everyday wear. Historically, this measurement has allowed consumers to easily understand and choose the appropriate level of coverage and resilience in their legwear.