Currently the ogryn has one of the coolest cosmetic hats out there in my opinion. That being the “OGMORE MK IA COMMANDO BERET (XXXXL)” When cosmetics first came out for the game they released a set of armor that was similar to the Catachan Jungle Fighters Regiment but they were “From my understanding” a group of people who lived on a swamp death world and utilized the same tactics as the Catachans did.
Catachan Armor while usually sleeveless also consists of 3 headwear types. One being a bandana of varying colors if only a normal Catachan. If you are one of the Catachan Devils “aka an elite veteran of Catachan Jungle Fighter” you wear a Red head band tied around your forehead, and if you are a squad leader or “Sarge” you wear a Beret.
With the long lore lesson aside I feel since we already have a deathworld regiment cosmetic we should get access to varying types of “headbands”, “bandanas” and even “berets” to fill out our Deathworld regiment needs.