Polyester
Condor 786Fd8 Class 2 Breakaway, Mesh, X-Back, No Pock
A nice touch with Lab X Creations is the thoughtful layout of controls.
Condor 3Rvc3 Back Support Premium With Detachable Suspenders Add'l Lumbar NIB
What stands out is how the black color doesn't attract heat, staying cooler in use.