This is a "Triada TKO" product, also known as "Kalashnikov Concern". The VKPO 3.1 System was an upgrade to the original VKBO from "BTK Group" and other manufacturers. The clothing includes a lot of upgrades to the original and takes heavy creative liberties from Arc'teryx LEAF UBACS, Shirts and especially trousers with the reinforcements/padding on the knees. Since 2023 Triada TKO have been manufacturing them with IRR materials.
The Baseball cap even though it is sized to measure in CM has an adjustable panel on the back which gives it several CM extra in headspace.
