"A Slice of Shoe" solves the inefficiency of conventional shoe manufacturing, which requires multiple steps-pattern-making, cutting, stitching, and adhesive bonding-generating scrap and mixed materials that are difficult to recycle. TTRI uses a robotic arm with fiber-spraying technology to spray-weave a seamless 3D upper in 30 seconds, forming a shoe under 150 g in one step with no stitching or adhesives. Production time drops by over 80% and labor by 90% versus traditional processes. The mono-material construction enables direct recycling without disassembly, cutting material costs by 40% and reducing landfill waste. This scalable platform creates industrial value across footwear and sportswear, advancing circular economy and sustainability goals.