PEBA is the flexible filament that keeps coming up in every drone, footwear, and robotics conversation we have had this year, and almost nobody outside a lab has printed it. So we are going to. We are ordering the three best-selling PEBA spools on Amazon, printing the same gyroid pad from each on the same machine with the same profile, and putting the results on video. This post is the plan, the reasoning behind which spools made the cut, and an open invitation to filament manufacturers who think their PEBA (or their TPU, or something we have not heard of yet) belongs in the lineup.
What PEBA is and why anyone should care
PEBA stands for polyether block amide. It is a thermoplastic elastomer with a nylon backbone and flexible polyether segments, which is why every listing you see calls it "nylon-based" or "super TPU." The pitch is simple: it springs back faster and more completely than TPU, it is lighter, and it stays flexible in the cold. 3DPrinting.com's 2026 flexible filament roundup puts it plainly: press a PEBA part and release it, and it snaps back noticeably faster than TPU. That same guide is honest about the cost of admission: PEBA needs precise temperature control, it oozes more than TPU, it needs a direct-drive extruder, and it costs more per spool.
The numbers on the spec sheets are consistent to the point of being suspicious, which we will get to. The short version: manufacturers are claiming roughly 78 percent energy return for the 90A to 95A grades, about 20 percent lower density than TPU, and printing speeds up to twice what a comparable TPU manages. Those are manufacturer claims, self reported, not something we have measured yet. Measuring them is the whole point of the test.
I want to try PEBA filament but there are ten brands on Amazon. Which one do I buy first?
Buy Siraya Tech Rebound PEBA 95A for your first spool, because it is the only consumer PEBA with a full product line, a published user guide and TDS, and enough independent coverage that you can troubleshoot it without guessing. When we checked Amazon on September 6, 2026, the 800 g black spool was listed at $52.24, which works out to about $65 per kilogram. That is more than the roughly $50 per kilogram SainSmart charges for its 90A. You are paying about $12 extra on the first spool for documentation, and for a first spool of a material that oozes, that is money well spent.
Here is how the field looked when we made the call, with each claim labeled by where it came from:
Siraya Tech Rebound PEBA (self reported by Siraya, verified on their site): three grades. 95A with a claimed 78 percent energy return, 85A with a claimed 62 percent energy return and cold resistance to minus 30 C, and PEBA Air, an actively foaming version where print temperature sets both hardness (70A to 95A) and density, with up to 50 percent weight reduction claimed. Rebound PEBA density is listed at about 1 g/cm3, which Siraya says is about 12 percent lighter than common TPU. Amazon showed the 95A at 4.6 stars across 76 reviews when we looked, the highest rating of any PEBA listing with more than 50 reviews (observed on the listing, not independently verified).
SainSmart PEBA 90A (self reported): 78 percent rebound, 20 percent lighter, 2x faster printing, nylon-based, 1 kg spool around $50. Amazon showed 4.4 stars across 134 reviews when we looked. SainSmart publishes a printer profile in its resource center, which is more than most.
Amolen Rebound PEBA 90A (self reported): the identical 78 percent and 20 percent claims. The listing showed a rating count over 1,000, but Amolen appears to pool ratings across its TPU and PEBA color variants, so that count is not PEBA-specific. That is our read of how the listing is structured, inferred, not confirmed.
The rest of the shelf: Synbotron, iSANMATE, Yousu, and SpoolHaus all print the same claim string on their listings: 78 percent energy return, 20 percent lighter, nylon-based, 2x faster. Same numbers, same phrasing. Our inference, and we want to be clear it is an inference, is that several of these are the same base resin under different labels. If the test bears that out, the cheapest spool becomes the value buy once you have a profile dialed in. If it does not, that is a more interesting video.
Fillamentum Flexfill PEBA 90A (verified from Fillamentum's product page and the 3DPrinting.com guide): the premium option at roughly $145 per kilogram. Batch-tested, resilience certified down to minus 60 C, food contact declarations available on request, and available in both 1.75 and 2.85 mm. It is not in our first test because the price puts it in a different category, but it is the spool to know about the day a customer needs a spec they can cite on a drawing.
The test: one gyroid pad, three spools, one printer
We are printing a gyroid infill pad, the kind of thing you would use as a drone landing foot, a vibration isolator under a sensor, or a shoe midsole coupon. Gyroid is the right structure for this because it loads evenly in every direction and it shows off exactly the two things PEBA is supposed to be good at: rebound and fatigue.
Every pad gets the same file, the same infill percentage, the same wall count, and the same nozzle, printed on our Bambu Lab X1C with its direct-drive extruder. We are deliberately not using our Vision Miner 22 for this. That machine earns its keep on PEEK and ULTEM, and flexibles are a different problem. We will start from each manufacturer's published profile where one exists, and from Siraya's where one does not, then tune only retraction and temperature.
What we will measure, on camera:
Print quality and ooze: stringing, surface finish, and how many retraction passes it took to get a clean part. Weight: each pad on the same scale, so the "20 percent lighter" claim gets a number. Rebound: a steel ball dropped from a fixed height onto each pad, bounce height measured against a ruler in slow motion. It is a crude version of the resilience test the spec sheets are quoting, and crude is fine when every sample gets the same treatment. Compression set: pads squashed under a fixed load overnight, thickness measured before and after. Cold flex: pads in the freezer for a few hours, then flexed and dropped again. We will label everything we measure as our own bench result, not a certified value.
My TPU parts feel dead when I squeeze them. Is PEBA the fix or am I printing wrong?
Probably both: most "dead" TPU parts are underextruded or printed with too much infill, so fix your flow and wall settings first, and switch to PEBA only if you need faster rebound, lower weight, or cold-weather flexibility that a properly printed TPU still cannot deliver. TPU at 95A is still the right answer for most gaskets, bumpers, and grips, and it prints on almost anything. PEBA earns its price on parts that flex thousands of times, parts that have to be light, and parts that live outside in winter. If your part is a phone case, stay with TPU. If it is a drone leg, a prosthetic liner, or a return spring in a mechanism, PEBA is worth the test. Either way, if you need a flexible part designed and printed rather than a spool to experiment with, our Build and Ship page is where to start.
Filament makers: send us your spool
This is the part where we are honest about what we want. Three spools from Amazon is a fair start, but it is not the whole market, and we would rather test against the best you have than against whatever the algorithm surfaced. If you make PEBA, a foaming elastomer, a high-rebound TPU, or a material you think beats all of them on a gyroid pad, we would like to print it on the same bench, under the same conditions, and put the results in the same video. We will show the good and the bad, we will label manufacturer claims as manufacturer claims and our measurements as our measurements, and we will not take money to say anything. That includes materials we would not normally buy: if your spool costs $145 a kilogram and you think the batch testing justifies it, we would like to find out on camera.
Email info@dcadditivepros.com with the material, the grade, and the profile you would like us to start from. We print on a Bambu Lab X1C for flexibles and a Vision Miner 22 for high-temperature work, and we can also scan and reverse engineer an existing flexible part if you want a real-world geometry in the test instead of a coupon; details on that are on our 3D scanning and reverse engineering page.
Frequently asked questions
Which PEBA filament should I buy first if I have never printed it?
Siraya Tech Rebound PEBA 95A. It has the most documentation of any consumer PEBA, a firm grade that prints more reliably than softer or foaming versions, and it is the reference PEBA in independent 2026 filament guides. Expect to pay around $65 per kilogram.
Can I print PEBA filament on a Bowden printer?
No. PEBA needs a direct-drive extruder. It oozes more than TPU and needs careful retraction and temperature tuning, so a Bowden path makes it nearly impossible to control.
Is PEBA really 20 percent lighter than TPU?
That is the manufacturer claim on most PEBA listings. Siraya lists its Rebound PEBA at about 1 g/cm3 and calls it roughly 12 percent lighter than common TPU. We are weighing identical printed pads to find out what the difference is in practice.
Are all the PEBA filaments on Amazon the same material?
We do not know yet. Several brands print identical claims (78 percent energy return, 20 percent lighter, 2x faster), which suggests a shared base resin, but that is an inference. Our side-by-side print test is designed to answer exactly that question.