Polymaker PC Filament, Clear Polycarbonate Filament 1kg Cardboard Spool - PolyLite Transparent PC Filament, Strong & Tough & Heat Resistant 3D Printer Polycarbonate Filament

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.