Here are a few prompts you could use to design a cool streetwear hoodie with DALL.E 2:
1. "Design a streetwear hoodie with a futuristic, cyberpunk aesthetic."
2. "Create a streetwear hoodie with an urban, graffiti-inspired design."
3. "Make a streetwear hoodie with a bold, colorful pattern."
4. "Design a streetwear hoodie with a sleek, minimalist look."
5. "Create a streetwear hoodie with an edgy, rocker-inspired style."
Remember to keep your prompt specific and concise, as this will help DALL.E 2 generate more accurate and relevant results. You might also want to include any specific details or requirements you have in mind, such as the desired color scheme or any specific graphics or patterns you want to include.