Deniers lower than 20 are referred to as sheer tights. These are available in a variety of leg looks including matt (which provides a powdery soft finish), gloss (which gives a more polished effect) and natural (which helps to blur imperfections and give the appearance of bare legs).
"When considering which colour sheer tights to purchase, try to choose the nearest one to your skin tone, much like buying foundation!" - Rebecca, Product Manager
The delicate nature of sheer tights means they can snag easily, so be extra careful when putting them on.