SUNLU Nylon PA6-CF 3D Printer Filament - 20% Carbon Fiber Reinforced, 209°C Heat Resistance, Individually Vacuum Packed, 4kg in Total, 1kg per Spool, 4 Pack, 4000g, (4xBlack)

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.