美国采购需求：女孩运动文胸，女孩长袖，女士紧身裤，女士T恤，女士背心，女士运动文胸

I'm at the initial stage of developing my activewear line and seeking insights on your production capabilities. I've detailed six designs, including items for both men and women, focusing on high-performance elements. The collection features intricate stitching techniques and utilizes a mix of premium fabrics, such as spandex and recycled polyester, aimed at providing comfort and durability. I'm interested in understanding the sampling costs and your minimum order requirements. Additionally, it would be great to know if there's flexibility for material adjustments and size specifications to better align with my vision. Looking forward to your response!