A custom bag is not just outer fabric. It is fabric, lining, reinforcement, foam, zipper, thread, binding, hardware, coating, seam construction, and the way those parts behave together.
Nylon is technical and strong, polyester is economical and versatile, canvas has a natural structured feel, PU gives a leather-like look, and recycled fabrics support sustainability positioning when certification and MOQ work.
A waterproof-looking fabric does not make a waterproof bag. Water enters through zippers, stitching, seams, corners, strap attachment points, and openings, so waterproofing must be designed into construction.
Stock fabrics keep MOQ lower and sampling faster. Custom-dyed fabrics, custom hardware, waterproof zippers, seam solutions, and certified recycled materials can raise cost, lead time, and minimums.
Start with the bag's use, expected load, desired feel, structure, surface appearance, colour direction, and must-have performance. A reference photo can communicate visual intent, but it cannot confirm fibre content, coating, thickness, or supplier availability. ProtoBag coordinates available options after the paid sampling scope is confirmed; final suitability is checked through the physical sample rather than promised from an image alone.
ProtoBag Studio is the Munich-based liaison and project coordination point for China-side custom bag sampling and OEM production. Send your project brief here, read our services, or browse more bag manufacturing guides.