3D Flexible White TPU Filament 1.75 mm, 2.2 LBS (1KG) Material: TPU，Hardness 95A

I was angry. I was ready to leave a garbage review. "IT'S PROBABLY WET," I was going to exclaim. I was getting popping noises like rice crispy treats during my prints, even while it was printing the brim."Well, I'll just up the temperature to 240 or 245. That's still within their rated range for this crap. Please please work." -- Nope."Well, frick, I must be printing faster than it can handle. 10/mms is pretty slow already in Cura though... Oh well. 5 it is." -- Worse."Well, if it isn't the temp, and it isn't the speed, then I'm going to turn the knob on my Ender 3 (affecting the Feed Rate percentage) WHILE its printing another failing snap crackle pop of a brim, and see how fast I can get it to really fail."....Wait. I'm printing at 115% and the popping is gone. My layer is beautiful. It's just like my Blue TPU from Tronxy I bought a year ago."What," I thought to myself, "This can't be right. TPU binds up and goes to crap when its too fast right? I'm on a Bowden tube on an Ender 3... no direct drive... so what gives?"*Ups it to 120%*"Ok, I'm pushing my luck now. That's pretty fast for 0.8 nozzle size and TPU on stock equipment. Best quit."And I did. I'm pretty sure 120% FR equates to 15 or 20/mms compared to my original 10. That's a tiny difference, and yet, here I am. It was printing TOO slow. Who knew.---------------------------------------------MY PRINT SETTINGS: I have found the following works well for this stuff on my Ender 3: 225c Nozzle (Keeping in mind I'm on a 0.8 nozzle, might not matter), 40c bed, 15-20 mm/s (this can be 20-25 or even 30 on a 0.4 nozzle), Retraction Distance: 2.0 mm, print cooling 55%.

Alright, where to begin. I ordered this filament last week after seeing a notice on the Tronxy 3d printer facebook group looking for users to test and review their TPU filament. I'm fairly new to 3d printing, but always willing to try something new, especially if it means I can create flexible prints. Since technically, my model of printer does not have a TPU compatibility, I consulted with tronxy's customer service about whether or not I could even make this work. Thank you to Lisa, who was most helpful and set me up with some basic settings on what temperatures and speeds I should use to run TPU on the XY-3 printer. (If this is any indication of Tronxy's customer service people in general, I would say they are very polite and helpful. Kudos!)Now to test this out and run a first print, I decided to run with a bracelet design I found on thingiverse.com to print one each for my wife and daughter. I made three attempts to print the first bracelet, with some issues with adhesion to the print bed on the first two. (In all fairness, I have the same problem with PLA and WOOD filaments and it takes a couple tries to dial in my settings so this wasn't a deal breaker.) The third time was the charm, and I managed to produce a quite nice bangle bracelet. Now the fun part of this was the supports. The bracelet was hollow and fairly open so it had loads of support structures. I also had some issues with the nozzle leaving strings at times when moving from section to section, but I changed a retraction setting to get that under control. Still, once the print was complete, I had a bit of work cut out cleaning. Just a note here, flexible prints as stretchy, and that includes the support frames! Not to worry, though, these can still be cut off fairly easily with a sharp utility knife.Once my bracelets were finished, I decided to make a third test print, a coaster. At this point, I was getting nice smooth lines (with only an occasional clump) and was able to put down a nice, clean, circle on the print bed (fyi, I also decided to improve adhesion by glue sticking the print surface. Which works very well.) I found the TPU filament works even better for this, as I got a nice flat circle that had a decent grip on the surface of my end table when in use. Of course I had to flex the coaster a few times just because I could, and i found it's flexibility to be indistinguishable from a rubber drink coaster I'd bought several years ago.Overall, I would definitely recommend this filament to other users. I found it easy to work with and smooth to print. I'm sure that as I continue to practice with my printer and get to know it's full range of functions and capabilities I can produce even better results.

UPDATE: This filament is awful to use. Constant binding and does not print well, even with a SeeMeCNC extruder. Baked the filament to make sure there was no extra moisture, still terrible. Don't buy this.This is not like NinjaFlex. Has a stiffness to it. Prints relatively easy. Printed with TRONXY XY3 with a direct drive setup.I noticed the filament has little kinks in it on the roll. Tried to get it in the picture. The layers have an issue adhering to each other over curves, could not figure that out. Even with direct drive it needs to print slow. I got the best print quality at 210°C.Would recommend for those printing RC parts and general flexible "useful" prints for around the house situations.

I have three colors of this filament now, and they all perform extremely well. On my QIDI X-Plus, I use a slow (25 mm/sec) print speed, slow retraction (also 25) and 220º print head. The items I've printed are almost indestructible and very flexible. I love this filament! I would have given it 5 stars, except for the cheesy packaging - a flimsy cardboard box and a non-resealable plastic bag. Filaments that are hygroscopic should be in a resealable bag.

I have used several TPU filaments and I found that even though I am still a novice at printing it and have a hard time with the settings to make it print perfectly, I got the best results from this filament. I noticed that it is far less stringy than others I have tried. It prints at 190° and sticks to a hairspray coated glass bed plate like it was holding on for dear life. The only thing I find wrong with this filament is that it is TPU, I print mostly PLA and expect PLA results and this doesn't get quite there, but it is not PLA and I get what can be expected of flexible filament. I use a direct drive extruder to print with this and I had no jamming/kinking issues. I designed the small flex coin pouch that is pictured with this review to print in TPU, it can be found on thingiverse. Overall this is a good flexible filament that prints in a very nice glossy white. I will purchase again once I run low on this roll.