Silk TPU Filament Glod 250g (0.55lbs), 95A Flexible 3D Printer Filament with High Elasticity, Neatly Wound & Moistureproof, Fit 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.