If you have ever tried to 3D print a comfortable shoe or insole, you know the struggle: soft TPU (like 75A) feels great but is nearly impossible to print without constant jams, while stiffer TPU (like 95A) prints beautifully but feels like walking on a hard plastic brick.

Enter the BIQU MorPhlex—the world’s first variable hardness flexible filament.

This revolutionary material is specially engineered to print stably as a firm 90A TPU, allowing your extruder gears to grip it easily for clean, tangle-free extrusion. But here is the magic: once the print cools and cures, it transforms into an ultra-soft, skin-friendly 75A. You get the hassle-free printing experience of a rigid filament, with the cloud-like, rebound comfort of premium footwear foam.

BIQU MorPhlex Variable Hardness TPU Filament 1.75mm (90A to 75A)

Features

Variable Hardness Technology: Prints firm at 90A for flawless extrusion and bridging, but softens down to 75A post-print for maximum flexibility and comfort.
The Ultimate Wearables Material: Specifically engineered for printing shoes, slippers, custom orthotic insoles, and soft ergonomic grips.
Beginner-Friendly Extrusion: Because it feeds into your hotend at 90A, it is vastly more stable than standard ultra-soft filaments, drastically reducing extruder jams and stringing.
Vibrant & Eco-Friendly: Available in a wide range of eye-catching colors. It is biodegradable, skin-safe, and perfect for prolonged physical contact.
High Precision: Manufactured with a strict dimensional accuracy of ±0.02mm to ensure consistent flow rates.

Real-World Maker Tips (Printing & Setup)

NO AMS / MMU: Like all flexible materials, do not run this through the Bambu Lab AMS or any other automated multi-material system. It will stretch, jam, and cause a massive headache. You must feed this directly from an external spool holder (preferably one with smooth bearings) straight into the toolhead.
Dry It Thoroughly: TPU is incredibly hygroscopic (it absorbs moisture from the air rapidly). Even though it comes vacuum-sealed, we highly recommend throwing it in a filament dryer before your first print to prevent stringing and popping noises.
Model Selection: If you are printing shoes, look for "segmented" STLs designed specifically for FDM printing. Segmented structures maximize the bending capabilities of the MorPhlex material!

Specifications

Feature	Specification
Material	Variable Hardness TPU
Diameter	1.75 mm (±0.02 mm)
Print Hardness (Feeding)	90A (Firm)
Final Hardness (Cured)	75A (Ultra-Soft)
Nozzle Temperature	225°C – 260°C
Recommended Flow Rate	2.8 – 4 mm³/s
Net Weight	1 kg

What's in the Box

1 × Spool of BIQU MorPhlex Variable Hardness TPU (1kg)
Desiccant Pack & Storage Box

Collection: BIQU FILAMENT

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BIQU PLA-HR Flexible Filament – Airless Basketball Material - 1kg

BIQU MorPhlex Variable Hardness TPU Filament 1.75mm (90A to 75A)

BIQU MorPhlex Variable Hardness TPU Filament 1.75mm (90A to 75A)