From its blue pattern, we can tell it is denim which is a perfect fabric for texturing jeans.
Denim jaens fabric texture seamless 16246
Denim Texture Images - Free Download on Freepik
Denim Fabric - PBR0260
Jeans Fabric PBR Texture - Buy Royalty Free 3D model by romullus (@romullus) [aaa2965]
Stitched Denim Jeans Texture Free (Fabric)