Flexible Filament Review


Flexible filament is not as frequently used in 3D printing as PLA or ABS for example. The reason may be that it is still an experimental material. Printing with it requires certain skills and good knowledge of your machine. Also, slicer settings, like in Cura or Simplify3D, have to be adjusted individually. Not all objects can be printed in flexible material. For example, joint parts designs that work well in PLA or ABS may require adjustment for flexible filament. Click on picture to zoom

Flexible Filament Review - SainSmart - Customized Phone Case

Flexible filament is ideal for customized phone cases.

Ideal for the Phone Cases – Flexible Filament Review

SainSmart TPU filament comes in a number of amazing colors. It doesn’t need high temperature to flow well. This filament works well with multiple objects. This material is great for making mobile phone cases. There is a wide range of printable files on STL sharing websites. We printed one case upside down with support, to see what it would look like. Support was hard to detach but it produced interesting result, like in the picture below. We could not immediately think of any use for the thin membrane that support created. However it might be useful in some designs.

Flexible Filament Review - 3D Printing Material - Upside Down Support Test

Flexible mobile phone case – upside down supports test.


Feel of The Rubber – Flexible Filament Review

We also tested NinjaFlex green semi-flexible material. There was a problem with the flow. First, we had too much material, then not enough, see mobile case pictures below. We had to change the extrusion multiplayer setting twice to get it right. 0.93 gave us the desired result. It could be a sign of inconsistent filament withd.

Flexible Filament - Over and Under Extrusions - Samsung Phone Case

Over and under extrusions.

The green octopus came out well, though cooling the top part is much recommended. Otherwise melting may cause damage to the object. The finished item felt like hard rubber. Please mind the warping when printing delicate, thin details. Some materials, not just flexible filament, shrink more than others. Octopus legs are thin and they cool down quicker. That’s why they got detached from the printing bed. Stronger adhesive and higher bed temperature help in this situation.

Flexible Filament - Mind the Warping - Green Octopus

Flexible filament tips & tricks – mind the warping.


Flexible Filament requires certain skills and good knowledge of your machine. Not all objects can be printed in flexible material. For example, joint parts designs that work well in PLA or ABS may require adjustment for flexible filament. Check our YouTube video below.


Lists & Tables: 3D Printing Filament for Desktop 3D Printers

It is important to use the right 3D printer filament material for the right job. Here you can find the list of materials available together with detailed reviews and picture galleries for the most used materials in desktop 3D printing. PLA, ABS, Wood, PETG, Nylon, Support, FLEX, etc. … Read More

WRB Cube - Plastic, Metal & Wood Composites - 3D Printing Materials for Desktop 3D Printers

WRB Cube – Plastic, Metal & Wood Composites – 3D Printing Materials for Desktop 3D Printers


Source & STL files

Very slim iPhone 6 case by Cqdude.
Anniversary Roses by XYZWorkshop.
Flexible Octopus by DiabaseEngineer.
Samsung Galaxy s5 Soft Case by Infernex87.
Slither.io by MaxFunkner.


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A unique resource which shares the firsthand experience in both 3D printing and 3D design. This experience is real and valuable. We expect our readers to find useful tips and tricks that they would need to start their own journey in this fascinating 3D world. 3DWithUs publishes original content. Our reviews, lists, and tables help to find your way around easily, all in one place. We are happy to share reviews and commentary from 3D designers, makers, manufacturers and software developers. Please contact us if you want to publish your content here.

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