Yes, it is possible to 3D print flexible materials. Flexible filaments, such as TPU (Thermoplastic Polyurethane), TPE (Thermoplastic Elastomer), and Ninjaflex, are commonly used for 3D printing flexible parts. These materials offer good elasticity and durability, making them suitable for applications that require flexibility, such as phone cases, watchbands, and medical devices. To print with flexible materials, a direct drive extruder is typically required, as these materials are prone to buckling in Bowden-type extruders. Additionally, lower print speeds and reduced retraction settings are recommended to achieve better results and avoid filament jams.