SUNLU Easy PA Filament, Nylon 3D Printer Filament with Heat Resistant, Nylon Filament No Cracking, Polyamide (PA) 3D Printing Filament Warp Free, Fit Most FDM Printer (Natural, 1kg)

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.