How do you make really cool shirts and pants on Roblox?

To make shirts and pants you must have Builders Club. If you have Builders Club, you can make shirts and pants using your favorite image editing program. Just download the template from the Roblox shirt upload page, and edit the template to make a shirt or pair of pants that looks like whatever you want. You can then upload the item to Roblox from the shirt or pants upload page.