Leather armor PBR Material Bundle include 25 high quality pbr materials which are provided with sbsar format and jpg textureset

you can use this product alongside: Leather Stripe substane painter path tools and material (SPPR+SBSAR) + FREE VIDEO TUTORIAL

sbsar files are capable of:

seed of leather texture and other variables
change normal intensity
change leather detail bump
change occlusion radius
change colors
change roughness
change some specific parameters

jpg texture sets have (2k jpg):

base color
metallic
roughness
normal
AO
heightmap