Stylish Backpacks for Work and Travel | DELSEY PARIS。Key Identifying Features of This Design This specific bag is a made-in-France prototype, designed to push the boundaries of traditional luggage. Hardshell Silhouette: Unlike standard leather or fabric bags, this uses a rigid, ultra-sleek material to maintain its \"dome-like\" shape. Minimalist Fastener: A defining characteristic of this prototype is the single, subtle metallic button fastener located at the bottom center. Convertible Function: The dual-clasp system at the top allows for a clean transition between backpack and shoulder bag modes without bulky hardware. Since this was a specialized design project and not a mass-market release, it is not available through traditional retail channels.