SainSmart Temperature Sensitive TPU Flexible Filament 95A 1.75mm, 1kg, Heat Discoloration, High-speed printing changed by 28 Low Temp.: when the temperature is higher than 28, it turns golden yellow automatically. The model will be more gorgeous. Flexible & Soft S: TPU (Thermoplastic Polyurethane) is a subclass of thermoplastics that prints strong parts that are also flexible. Durable & Sturdy: Elongation at break 800%. It is much higher than other materials, with high impact resistance, good flexibility, good tear resistance, wear resistance, cut resistance, and a low long-term compression set. Strong UV Resistance: Good oil resistance, low-temperature resistance, and aging resistance. It is suitable for various outdoor scenes. Easy to print: Compatible with most 3D printers with direct extruder and bowden extruder. Better performance for short-range feeding.