Polymaker Break Away Support Material for Nylon PA12 Filament, 0.5kg Spool - PolySupport 3D Printer Support Filament Easy Support Removal by Hand

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.