Parts printed with these polyester filaments absorb less moisture than other types of plastic, making them ideal for use in wet or humid environments. They are more durable and flexible than PLA, and easier to print than ABS. Use these filaments with fused filament fabrication (FFF) 3D printers, and print onto a heated print bed. Printing onto a cool surface causes the molten filament to change temperature rapidly, which can warp your designs. Although finished parts are moisture-resistant, these filaments are sensitive to humidity, and should be stored in a dehumidifying cabinet or a sealed container with desiccant for the best printing quality.

PETT forms strong bonds between layers, so prints will not split apart. It is often used to make large models with large layers.

Tensile strength is the best measure of a filament's overall strength. Similar to the stress applied on a rope during a game of tug-of-war, it's the amount of pulling force a material can handle before breaking. A higher rating means a stronger filament. A tensile strength of 5,000 psi and above is considered good; 12,000 psi and above is excellent.

Maximum exposure temperature is the point at which a printed part will begin to deform. Above this temperature, your printed parts will start to lose structural integrity.