Flex TPU 95A Filament - High Flow Flexible Tough Filament

In this review of the Flex TPU 95A Filament the bottom line is simple: it is best for makers and small-run manufacturers who need a high-flow, tough flexible material for wearable or protective parts. The reviewer found the filament strikes a strong balance between flexibility and durability thanks to its Shore A 95A feel and ISO 10993 testing, which is reassuring for external-use wearables. Printing was generally straightforward on a direct-drive machine, and the moisture-resistant resealable bag maintained consistent spool quality over multiple prints.

Key Features

• Optimized Flexibility & Durability: A Shore A 95A formulation produces parts that are firm yet flexible enough for soles, straps, and impact-absorbing details without tearing easily.
• ISO 10993 Tested: The filament underwent ISO 10993-10, -5, and -23 testing, providing relevant biocompatibility data for external wearable and protective applications.
• High Flow, High Speed: The high-flow design allows faster print speeds than standard TPU 95A while maintaining dimensional stability for functional parts.
• Moisture-Resistant Packaging: The spool ships in an aluminum resealable bag that helps prevent water absorption and supports up to three years of shelf life.
• Wide Compatibility: Works with most FDM 3D printers and performs best on a direct drive extruder for consistent extrusion and reduced filament stretch.

Who It's For

This filament suits footwear designers, prototypers, and makers building protective gear or external wearable components who need a tough, resilient TPU with documented biological testing. Its higher Shore hardness makes it ideal where shape retention and abrasion resistance matter more than soft cushioning.

Users who require very soft elastomers below 95A or who rely on Bowden setups without adjustment should consider other softer TPUs or confirm Bowden compatibility first, since the material performs best with direct drive extrusion and some users reported mixed adhesion behavior to tubing and fittings.

Pros & Cons

Pros

• High-quality prints with good flexibility and toughness for functional parts and wearables.
• ISO 10993 testing offers added confidence for external-contact applications.
• High-flow formulation shortens print time while keeping detail and layer adhesion strong.
• Resealable aluminum bag helps keep the spool dry and extends usable shelf life.

Cons

• Firm 95A hardness is not ideal for users needing very soft, cushioning TPU.
• Some customers report variable stickiness to tubing and different extrusion setups, so tuning may be required.

Specifications

Brand	Siraya Tech
Material	TPU, Shore A 95A
Test Standards	ISO 10993-10, -5, -23
Spool Weight	1kg
Packaging	Moisture-resistant aluminum resealable bag
Printer Compatibility	Most FDM printers; recommended direct drive extruder

Our Verdict

The Flex TPU 95A Filament is a solid option for users who need a high-flow, durable flexible filament with documented biocompatibility for external-use projects. It offers good value for footwear and protective gear prototypes where toughness and print speed matter, provided you have a direct drive setup or are prepared to tune extrusion to avoid stickiness issues.

Frequently Asked Questions

Is this filament safe for skin contact?
It has been tested to ISO 10993-10, -5, and -23, providing data relevant to external-use wearables, but final suitability depends on your specific application and regulatory needs.

What extruder type works best?
A direct drive extruder is recommended for the most consistent printing performance and reduced filament stretch with this TPU.

How should the spool be stored?
Keep the filament sealed in the provided aluminum resealable bag when not in use to prevent moisture absorption and preserve print quality.