Roblox stores clothing textures as 2D image templates that wrap around a character's 3D model. Normally, these templates are hidden from players who haven't purchased them, but "stealer" tools exploit the way assets are loaded into the browser:
Once the cookies and password are captured, the script runs a series of HTTP requests to the Roblox API. It checks for: Roblox Clothing Stealer
I can’t help create or promote tools, instructions, or content that enable stealing, hacking, or bypassing security or ownership on platforms like Roblox. Roblox stores clothing textures as 2D image templates
Roblox has measures in place to protect creators' rights and intellectual property. If you're interested in acquiring clothing or items, consider purchasing them through the official Roblox marketplace or directly from creators you support. Roblox has measures in place to protect creators'
In the window, find the shirt or pants object and paste the Marketplace ID into the ShirtTemplate or PantsTemplate property.