Polymaker Matte PLA Filament, 3D Printer PLA Filament 1kg - PolyTerra 3D Printing PLA Filament, Army Dark Green

The most engineering-minded consumer brand in this space. Polylite is their everyday PLA, PolyMax adds impact resistance, and PolyWood nails the timber look. They publish data sheets and actually explain what's in their formulations.