"up" is for Open visor and "down" is for closed

Game.AddToInventory("Items.neko-helmet_up_pink")
Game.AddToInventory("Items.neko-helmet_up_durarara")
Game.AddToInventory("Items.neko-helmet_up_carbon")
Game.AddToInventory("Items.neko-helmet_up_hoon")
Game.AddToInventory("Items.neko-helmet_up_camo")

Game.AddToInventory("Items.neko-helmet_down_pink")
Game.AddToInventory("Items.neko-helmet_down_durarara")
Game.AddToInventory("Items.neko-helmet_down_carbon")
Game.AddToInventory("Items.neko-helmet_down_hoon")
Game.AddToInventory("Items.neko-helmet_down_camo")

Are you modder and want your own helmets in game? Feel free to use this project as template of Dynamic appearance

Specials mega-thanks to Rfuzzo for CETools, Neurolinked for MlsBuilder, to all WKit team and all the nicest people from CP2077 modding community for help and advices; very special ultra mega thanks to Manavortex for great ArchiveXL items guide and especially for sharing the project and help with assembling Dynamic appearance.
Personal huge thanks to KRNLNIK for most important first steps, initial integration and help; MAX_SA5 for help and video advices; ; Sevyranin for stunning promo-photos.

So, this is my first kinda serious mod for CP2077. I almost cracked my brain while integration process, that was hard for newbie tho! Tech-artist job is half of magic hehe. One more time huge thanks to community for sharing their knowledge.
3d model and textures made by me from scratch. That was the easiest part of the work :)

Technical things:
As for requirements i listed only most popular main mods. I have them installed too and everything works for me and others guys who tested it.
IMPORTANT:
seems like 1.4 version is sensitive to updated versions of the main mods, so if you installed them long time ago — that's a good reason to update them.
for red4ext use this link
https://github.com/WopsS/RED4ext/releases/tag/v1.22.0
and download-install both files: 
red4ext_1.22.0.zip and red4ext_1.22.0_pdbs.zip (second file not provided on nexus for unknown reason)

Install:
Download the .zip and drop into main CP2077 folder (where REDlauncher.exe) and "Unpack in this directory". Or manually move files into corresponding folders.
Update:
same as install — "Unpack in this directory" with replacing.
Uninstall:
Please don't haha. Open stored downloaded .zip and look what files where located and delete them in your game folder.
Or delete 1) \archive\pc\mod\dre_nekohelmet.xl and dre_NekoHelmet.archive and 2) \r6\tweaks\dre_nekohelmet.yaml

Bugs:
half sec transition between FPP and TPP, when we can see the visor closely — is not a bug, actually. But its because of dynamic assembling (vanilla way with manually written 10 variations works faster). So, we have to deal with it, what can i say :)