SUNLU High Speed Matte PLA Filament 4KG/s Fast 3D Printer Filament Bundle, Smooth PLA Matte Filament for FDM 3D Printer, 1KG Reusable Spool 4 Packs, Cherry Red+Sky Blue+Olive Green+Sunny Orange

Well-known as much for their S1/S2 filament dryers as for the filament itself. The material catalog — PLA, PETG, ABS, TPU, silk — is broad and frequently discounted on Amazon. Solid all-around option.