GT FLEX Original - Clear Aligner & Retainer Thermoforming Plastics

Good Fit materials are engineered GT FLEX PRO and GT FLEX MAX to be *10-50x stronger* than GT FLEX ORIGINAL, making them the go-to options for clear retainers. But we didn’t forget about flexibility. In fact, both PRO and MAX are more flexible than ORIGINAL, despite their added strength, which lends an extra element of comfort to PRO and MAX retainers.

Super Strong, Super Flexible, Super Clear

Each of the three GT FLEX formulations – ORIGINAL, PRO, and MAX – offers a world-class combination of flexibility, strength, and clarity.




BPA-Free, Latex-Free, Phthalate-Free, and Gluten-Free
The GT FLEX materials are engineered with patient health and safety in mind. The materials are 100% free of BPA, latex, phthalate, and gluten.

Proven Success
GT FLEX  aligner & retainer materials are helping dentists around the world achieve great outcomes for their patients.

High Strength and High Flexibility
The ability to provide both high strength (for fracture resistance) and high flexibility (for comfortable tooth movement) is one of the key advantages of the GT FLEX clear aligner & retainer materials. In many materials, if you increase flexibility you risk losing strength. But GT FLEX delivers both strength and flexibility at the same time.

More Continuous Force
All clear aligners lose strength over the time that they are worn in the mouth. If the strength at which they push against the teeth starts too low or changes too rapidly, it makes it very difficult to get effective, predictable tooth movement.

Ultra-Low Water Absorption
The GT FLEX clear aligner & retainer materials have ultra-low water absorption – measured at just 0.14% in 24 hours – which helps them stay clear and odor free in the mouth. It also helps make GT FLEX…

Easy to Use
Some aligner and retainer materials need to be processed within 15 minutes of removing them from their protective pouches. This is typically due to excess water absorption. If the material absorbs too much water prior to processing, the heat from the thermoforming machine will turn that water into steam. And that steam will create bubbles, which reduce both the clarity and the strength of the final aligner.

With its ultra-low water absorption, GT FLEX has no 15-minute processing restriction. You can effectively process it at your leisure, and it’s unlikely to form bubbles during processing.

Dual, Protective Lamination
The GT FLEX clear aligner & retainer materials come with a super-thin, protective lamination on both sides. These protective layers are designed to stay in place throughout the thermoforming process. They help protect the aligner or retainer from absorbing potentially nasty chemicals from the printed models and from dust or other debris that could reduce the clarity of the finished aligner or retainer.

They also provide a generally higher level of sanitation to the finished aligner or retainer – some dentists even deliver the aligners or retainers to patients with these protective layers still in place.

Durable and Comfortable
With their unique combination of high strength and high flexibility, clear aligners and retainers made with the GT FLEX materials are both durable (fracture-resistant) and comfortable.

Unique & Patent-Pending
The GT FLEX materials incorporate a variety of proprietary innovations, all designed to help make them perform better as aligner materials.


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Material Safety Data Sheet (MSDS)