Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic
The file was named striped lens, but hey – Translucent Fibres works too.
Source Angelica
No, not the band but the pattern. Simple squares in gray tones, of course.
Source Atle Mo
A nice and simple gray stucco material. Great on its own, or as a base for a new pattern.
Source Bartosz Kaszubowski
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
Number five from the same submitter, makes my job easy.
Source Dima Shiper
Medium gray fabric pattern with 45-degree lines going across.
Source Atle Mo
Might not be super subtle, but quite original in its form.
Source Alex Smith
Remixed from a drawing that was uploaded to Pixabay by captenpub.
Source Firkin
If you like it a bit trippy, this wave pattern might be for you.
Source Ian Soper
White little knobs, coming in at 10x10px. Sweet!
Source Amos
Original seamless pattern with an Inkscape filter.
Source Firkin
Plywood Web Background background image for use in web design.
Source V. Hartikainen
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin
Simple combination of stripy squares with their negatively coloured counterparts
Source Firkin
From a drawing in 'At home', J. Sowerby, J. Crane and T. Frederick, 1881.
Source Firkin
Did some testing with Repper Pro tonight, and this gray mid-tone pattern came out.
Source Atle Mo
Never out of fashion and so much hotter than the 45º everyone knows, here is a sweet 60º line pattern.
Source Atle Mo
To get the tile this is based on, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin