Polymaker Panchroma Dual Silk PLA 3D Printing Filament 1kg, Silk Caribbean Sea (Blue-Green), New and Improved Formula, Better Strength, Printing Speed & Clog-Free

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.