If you're a Breath of the Wild fan, I'm sure you'll recognize this style of armor ;) 
I created the armor pieces in Blender to look as close as I could to that. I made textures myself in Gimp as well. But, then I wondered if something so directly inspired by another game was okay here or not, and so, I've decided to upload this with somewhat more lore-friendly Textures after asking in ModTalk forum, rather than the ones I originally made. In case anyone DOES happen to want the original textures, they can be found here. 

But I think it looks nice like this, as I quite like the thought of Akaviri ninja in my Cyrodiil

(this one is the 'Dark Armor Only' under optional files)

This is my first mod for this game, it's not perfect and definitely not as cool as other clothing mods here, but hey I'm just a baby modder! I hope to improve my skills, whether for this game or others :)

These use the Robert male and HGEC female body types, but might still look okay even if you don't use those bodies in your game since the only exposed skin on these is the fingers. There also may be clipping with the Masks if the face deviates a lot from the default sliders, but in such cases I just left them off my character since the Masks are separate pieces (they use the amulet slot)

There are options for BBB as well as different body types, and optional Enchantment on them (see under Install)

They can be found in a chest inside the Talos District's Tiber Septim Hotel.


=========
Install
=========
Important: choose only ONE of the 'Main Files'. Don't try to use both, they'll conflict. To install, drag the 'meshes' & 'textures' folder into your Data folder, and tick the .esp.

There are 2 versions under 'Main Files' to choose between---

One has just the Robert muscular male/HGEC E cup female (pictured at top) + 2 recolors.

The other .zip has those AND these variant body types (Bodybuilder male/Fighter B cup female):


No matter which version, each .zip has an optional folder with BBB-enabled tops for the females if you use Better Bouncing Breasts in your game (requires Coronerra's Maximum Compatibility Skeleton). Just copy those to the appropriate folder and overwrite the originals.

There is also an optional folder with an alternate .esp to use if you want the armor set to be Enchanted. The Mask has Resist Disease (Grand), the Bracers have Fortify Block (Grand), and the Chest, Greaves, and Shoes each have Fortify Sneak (Grand).

 
UPDATES:
Texture paths have now been fixed for all files, so there shouldn't be any more missing/purple textures. Some parts had previously been set to the Steam file path which doesn't work for all users. Please re-download to fix it if you had missing textures.

As requested, there is now a separate .zip for Dark Brotherhood Default Replacement:

This will replace the default 'Shrouded Armor' worn by player and NPCs in the Dark Brotherhood to a black version of my armor. 'Shrouded Hood' will now have a Mask as well, so all characters with it will have much of their faces hidden, as befits assassins. This Mask is compatible with Khats and Args (the OCO v2 versions at least, they might clip with vanilla). Other minor changes made to fix clipping with tails/Arg necks when crouched. Drag 'meshes' + 'textures' folders to your Data folder to install. If you want the vanilla armor back, simply delete my files in the 'dark brotherhood' meshes & texture locations. If using another mod's replacers, please make sure to back those up first before overwriting with mine!

Per request I have added a .zip containing replacement textures for the 'Shadow Stealth' main set, these will get rid of the symbol on the chests. Drag 'textures' folder to your Data folder + overwrite what's there, AFTER you've already installed one of the 'Main Files'.

Added an optional file in downloads: use to get ONLY the Black Armor. This file is standalone (doesn't require Main File) and WON'T replace whatever Dark Brotherhood armor you have, whether vanilla or another mod. Located in a small chest in Tiber Septim Hotel. Drag 'meshes' + 'textures' folders to your Data folder to install, tick the .esp.

Added optional file for Dark Brotherhood Replacement, this one is Black armor BUT has Red Trim:

Drag 'meshes' + 'textures' folders to your Data folder to install. This WILL replace whatever your Dark Brotherhood members were wearing before, whether vanilla set/another mod's replacer.

================
Uninstall
================
Delete the 'ShadowStealthArmor' folders from the following locations:
meshes/armor
meshes/clutter
textures/armor
textures/clutter
textures/menus/icons/armor
and delete the Shadow Stealth Armor Set .esp from Data folder. 

=============
Credits =)
=============
All credit goes to the following awesome creators, almost everything is theirs and was originally made by them (except for most textures and the armor pieces, those I made in Gimp/blender)
Exnem, RAIAR & MadCat221 (HGEC body, and female texture used as base for bodysuit) 
Robert (male body v5, and texture used as base for bodysuit)
Room207 (wideneck bodybuilder body)
Pizz (sandals mesh from Pizz Ninja set)
coronerra (BBB and Maximum compatibility Skeleton)
And thanks to Gerra6 for the amazing KG Tools
NaRae Pose 02 mod and Greek Storm/Pacific Morrowind pose pack for the poses used in screenshots