We are developing innovative lingerie collections requiring adaptive bras that accommodate multiple cup sizes (e.g. A-C/B-D) with these specifications:  
1. Core Requirements:  
- High comfort combined with fashionable, elegant designs  
- Sustainable materials and ethical production processes  
- Target production cost aligned with €30-40 retail price range  
- Annual capacity for 3-4 collections (lace/sporty/everyday styles)  

2. Supplier Capabilities Needed:  
- Experience in developing adjustable bra mechanisms  
- MOQ and lead time details  
- Sustainable material options (e.g. recycled fabrics, OEKO-TEX certified)  
- Samples/portfolio of similar technical lingerie projects  

3. Commercial Terms:  
- Initial price quotation/indication  
- Quality control system overview  
- Capacity for long-term collaboration  

Please provide technical specifications and certifications for proposed materials.