PLA vs PETG: Which Material Should You Choose?

Choosing the right material for your 3D print can make or break your project. The two most popular options—PLA and PETG—each have their strengths. Here's how to pick the right one.

PLA: The Everyday Choice

PLA (Polylactic Acid) is where most people start, and for good reason. It's easy to print, looks great, and works for the majority of projects.

Best for:

• Prototypes and concept models
• Display pieces and decorative items
• Parts that won't see heavy use
• Anything that stays indoors

The good stuff:

• Prints reliably with minimal fuss
• Great surface finish out of the box
• Wide range of colors available
• Eco-friendly (made from corn starch)
• No heated enclosure needed

The trade-offs:

• Softens around 60°C (140°F)—don't leave it in a hot car
• More brittle than PETG
• Not ideal for outdoor use long-term

PLA in Action: Decorative Keychains

PLA can suit decorative keychains where color and detail matter. For a keychain carried daily, test the attachment loop and consider how it will handle drops, bending, and heat.

Custom NFC keychains printed in PLA for Vercel Ship

For a batch, print a sample first and check the finish, dimensions, and hardware fit before making the rest.

PETG: When Durability Matters

PETG (Polyethylene Terephthalate Glycol) is the step up when you need something tougher. It takes a bit more care to print but handles real-world abuse much better.

Best for:

• Functional parts and mechanical components
• Outdoor use
• Anything that needs to handle impact
• Parts exposed to moisture or chemicals

The good stuff:

• Much more impact-resistant than PLA
• Often tolerates more heat than ordinary PLA; check the exact grade and load rather than treating 80 C as a service rating
• Weather and UV resistant
• Good chemical resistance
• Slight flexibility prevents snapping

The trade-offs:

• Stringing can require drying and retraction tuning
• Slightly glossier finish
• Costs a bit more than PLA

PETG in Action: Functional Mic Accessories

For parts that need to handle daily use and potential drops, PETG is the way to go. This custom microphone accessory needed to clip securely and survive being handled constantly.

Custom microphone accessory printed in PETG

The slight flexibility of PETG means it won't crack under stress, and it holds up to oils from hands and general wear.

Quick Decision Guide

Choose PLA if:

• It's a prototype or display piece
• It'll live indoors
• You want the widest color selection
• Budget is a concern

Choose PETG if:

• The part needs to be functional
• It's going outside
• It might get dropped or stressed
• Heat resistance matters

Still Not Sure?

Most projects work fine with PLA. When in doubt, start there. If you're building something that needs to survive daily use—a bracket, a mount, a tool holder—go with PETG.

List the temperatures, loads, and environment the part will face. If neither material meets those requirements, use the material selection guide to compare alternatives.