SUNLU PETG Filament 2KG, High Strength PETG 3D Printer Filament, Dimensional Accuracy +/-, 1KG Spool(2.2lbs), 2 Pack, Black+Grey

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.