A report on just-style last week described as a "missed opportunity" the distribution of a Vietnam-made backpack at the launch of a new multi-million dollar initiative intended to develop US-made high-tech fabrics. But for Stephen Lamar, executive vice president at the American Apparel & Footwear Association (AAFA), the item's value is overwhelmingly US - and reflects the way supply chains are likely to evolve in the future.