How do you write description for clothing products that are the same material but have different designs?

I have a POD store and my products description are automatically set by Printful, and it looks unprofessional because some products are the same but with different designs (two jearsy t-shirt from the same company for example), so I want to rewrite it in a way that is seo-friendly, how do you guys write yours? Would you be talking about the design idea?