Polypropylene Polypropylene is great for high-cycle, low strength applications due to its fatigue resistance, semi-flexible, and lightweight characteristics. Polycarbonate Polycarbonate is known for its strength and durability. It has very high heat and impact resistance making it an ideal choice for tough environments. ASA ASA is a common alternative to ABS and is great for outdoor applications due to its high UV, temperature, and impact resistance. Nylon Nylon is a tough and semi-flexible material that offers high impact and abrasion resistance. It is an ideal choice for printing durable parts. HIPS HIPS is a lightweight material most commonly used as a dissolvable support structure for ABS models. ABS ABS is a low cost material, great for printing tough and durable parts that can withstand high temperatures.