Ultimaker Tough PLA is a technical PLA (polylactic acid) material with toughness similar to ABS. Ideal for reliably printing functional prototypes and tooling at larger sizes, our Tough PLA offers the same safe and easy use as regular PLA. Also MakerBot Tough filament is designed to overcome common flaws in ABS 3D printing?including warping and curling?so you can print your parts reliably without excessive adjustments or tweaking.