Complex sentence: Using a 3D scanner, a shoemaker can create a bespoke last based on your foot to make the footwear, which is called it "functional shoes" since it will prevent bunion and callus.
Split into simpler sentences: Using a 3D scanner, a shoemaker can create a bespoke last based on your foot to make the footwear. Thanh called it "functional shoes" since it will prevent bunion and callus.