250 g. Skin FlexiSMART 1.75 mm Flexible filament TPU for 3D Printer - Flexible filament for 3D printing - TPE filament, TPU filament, elastic filament

Very pleased with the performance of this flexible filament. Prints like PLA, low odor and good adhesion to the bed. Printed well on a glass bed heated to 50C and only minimal stringiness. The strings (threads of fine hair-like extra extrusions) that you get depends on the type of item you are printing and how many. This can be minimized by tweaking the extruder temp and printing speed as well as the retraction distance and speed. The main issue is that a flex filament doesn't like to retract, it stretches first, Dragging of strings between multiple items on the bed is slightly annoying since cleaning the flex filament of these strings from the model is not easy. I suggest only printing one item at a time. I used a direct extruder, I doubt you would be successful printing with a bowden remote extruder but I will try it when I get one and update this review.

Excellent filament. Never tried flexible filament before. Followed advice on how to print with it from their website and worked first time