美国采购需求：连帽衫

I'm reaching out to explore collaboration on some apparel items like hoodies, sweatshirts, and sweatpants for my brand, The Futile Company. I'd like to start by sending you some design images that I envision for these products. Could you please let me know the best way to submit these images? Once the samples are created and approved, I'm looking to place a larger order. Looking forward to your guidance!