YOUSU PLA Plus (PLA+) Filament Transparent 1KG,High Toughness PLA Pro 3D Printer Filament, Dimensional Accuracy +/-(2.2lbs),3D Printing Filament Fits for Most FDM 3D Printers
Chinese manufacturer (Guangzhou YOUSU 3D Technology) specialising in co-extrusion silk and multi-colour PLA filaments. Sells on Amazon under the YOUSU brand.