The first 3D printing I encountered in the real world was at a design exhibition, a woman had developed a way of printing a shell for a shoe in a firm, but flexible, plastic with a much softer interior to provide the precise fit.
Or
The first 3D printing I encountered in the real world was at a design exhibition, a woman had developed a way of printing a shell for a shoe in a firm, but flexible, plastic with a much softer interior to provide the precise fit.
Or