Any denier 40 and higher is considered opaque and not see-through, while anything less than 30 denier is more of a transparent, sheer stocking. You can find 80 denier (and even up to 100 denier) tights that are super thick and opaque.

Which is thicker 15 or 20 denier?

The higher the denier, the thicker the fabric. Deniers lower than 20 are referred to as sheer tights, which are made of fine threads and offer light leg coverage. While, opaque tights begin at 30 denier and mean you won't be able to see as much skin through the fabric.

Which is thicker 60 or 40 denier?

Basically, the crux of it is, the higher the denier the more opaque your tights will appear, as well as being thicker and warmer too. ... 15 denier. 40 denier. 60 denier.