SUNLU TPU-Silk 3D Printer Filament, 98A TPU Filament, Glossy Silk Surface 3D Filament, Flexible 3D Printing Filament, Dimensional Accuracy +/-, 1kg(2.2lbs) Spool, Cream White

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.