12 Best PETG Filaments — Buying Guide for 2026

【Answer 1】 09 Fillamentum PETG Fillamentum PETG enjoys a strong reputation as a robust and reliable PETG filament, offering a wide range of intriguing and unconventional colors. Starting at approximately ¥209 per kilogram spool, Fillamentum’s PETG is available only in single-kilogram spools, with an average diameter tolerance of ±0.05 mm. However, its true standout feature is its color palette: over 20 hues are available—nearly every one uniquely interesting or distinctive, each bearing a fittingly evocative name. Lemon Yellow Transparent, Golden Cloud, Forget-Me-Not Blue, and Ocean Wave look especially cool—but our favorite is Wizard Voodoo: a magical gradient transitioning between deep blue and black. For users seeking more sustainable options, the company offers rePETG Loopfill—a medical-grade recycled PETG made from surplus materials sourced from the healthcare industry. 10 Prusament PETG As expected from this meticulous Czech 3D printing giant, Prusa Research produces its own line of 3D printing materials under the ‘Prusament’ brand—and its PETG filament is manufactured to exacting specifications. Prusament PETG boasts exceptional dimensional accuracy, with a tight tolerance of just ±0.02 mm, and remains competitively priced at around ¥230 per kilogram spool. In terms of value-for-money, it’s hard to beat—especially given its 25 available colors. Prusament PETG also comes in refill-only packs (saving ¥14–¥22), 2 kg high-capacity spools (with an additional cost of ~¥144), and a flame-retardant variant called V0. For users needing extra strength, carbon-fiber-reinforced blends, matte-black surface finishes, recycled PETG (made from 100% post-consumer PETG—resulting in batch-to-batch color variation), medical-grade PETG Tungsten, and paramagnetic PETG Magnetite 40% are all available. This brand certainly offers no shortage of PETG options—but it does not yet offer high-speed or high-flow variants; maximum recommended print speed is 200 mm/s. Safety nets are rarely needed, but Prusa Research is renowned for outstanding customer support—so any potential issues would likely be resolved promptly. 11 Protopasta PETG If you’re looking for a dependable, U.S.-made filament from a brand known for meticulously engineered professional-grade materials, Protopasta’s PETG lineup is a strong contender. Its current PETG series includes solid colors such as transparent, black, white, red, and blue, offered in multiple formats: small coils, 500 g spools, 1 kg spools, 3 kg spools, and multi-spool bundles. The company’s Simply Clear PETG and Simply Black PETG are positioned as high-quality, budget-friendly options—both made from 100% virgin PETG.

10 Reliable Flexible 3D Printing Filaments and Printing Tips

【Answer 2】 FlexiFil is a high-performance, rubber-like TPC featuring a unique 'bend memory' that enables printed objects to return to their original shape after bending. According to FormFutura, FlexiFil combines exceptional flexibility, mechanical strength, durability, excellent chemical resistance, outstanding UV stability, and resilience across extreme temperature ranges. Python Flex is a TPU filament designed for producing flexible and elastic parts, optimized for both direct-drive and Bowden extruders—and capable of high-speed printing. Python Flex can be printed directly onto glass beds without requiring a heated bed. In its natural state, the filament exhibits extremely high transparency. MD Flex is a flexible TPU-based 3D printing filament enhanced with a patented nano-copper composite, proven to eliminate over 99.99% of fungi, viruses, bacteria, and microorganisms—including scientifically verified high efficacy against SARS-CoV-2/COVID-19. Printing Parameters: FlexiFil TPC (30D/40D): 220–260°C / 90–110°C / Speed not specified Python Flex: 220–250°C / >60°C / 50–100 mm/s MD Flex: 220–250°C / >60°C / Speed not specified Available Weights & Diameters: 0.65 kg, 2 kg; 1.75 mm, 2.85 mm Colors: Transparent, black, dark gray. 11 Prusament Prusament is Prusa Research’s in-house filament brand, offering a TPU 95A filament that—based on our testing—delivers outstanding quality and beginner-friendly performance. Designed to avoid common frustrations associated with flexible filaments, it reliably produces durable, flexible, and highly abrasion-resistant parts. Unlike NinjaTek, Recreus, Siraya Tech, or FormFutura, Prusament does not offer a full flexible filament lineup spanning multiple Shore hardnesses—only the 95A variant. This practical, predictable filament delivers useful flexibility while retaining sufficient stiffness for reliable feeding and printing. As such, it excels for applications like protective cases, grips, bumpers, seals, feet, tool holders, and other functional, wear-resistant components—without the feeding challenges often encountered with softer TPU or TPE filaments. Printing Parameters: TPU 95A: 220–240°C / 55–75°C / Up to 30 mm/s Available Weights & Diameters: 1000 g; 1.75 mm Colors: Red, blue, white, black. 12 Kimya Kimya was a company that previously produced three distinct types of flexible filaments: PEBA, TPU, and TPC—as well as an rTPU variant made entirely from 100% recycled material. The company ceased operations in November 2024, though remaining stock may still be available through distributors. Kimya’s PEBA filament was based on Arkema’s PEBAX® material.

Prusa Steps Into Pellet 3D Printing with Prusament Pellets: Up to 60% Cheaper Than Filament

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Prusa enters the pellet 3D printing market with Prusament Pellets, offering raw polymers up to 60% cheaper than filament. Available in PLA, PETG, ASA, and PC Blend, these pre-dried pellets target large-format printing and DIY experiments.

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