Frame Material Guide: Acetate vs. Metal vs. TR90
A companion to our full materials guide, focused on the three most common frame materials you'll see while shopping.
| Material | Weight | Flexibility | Style |
|---|---|---|---|
| Acetate | Medium | Low -- holds its shape | Bold colors and patterns, thicker profiles |
| Metal | Light | Moderate | Thin, minimalist profiles, classic looks |
| TR90 | Very light | High -- bends and returns to shape | Sporty, durable, great for active wear |
Choosing Between Them
Acetate is a plant-based plastic prized for rich color and pattern options and a substantial, premium feel -- it's the material behind most bold tortoiseshell and colorful frame designs.
Metal frames (often stainless steel, titanium, or alloys) offer a lighter, more minimal look and tend to suit classic and professional styling.
TR90 is a flexible nylon-based polymer that can bend significantly without breaking, making it a popular choice for kids, athletes, and anyone wanting a nearly indestructible everyday pair.
For a deeper dive
See our full guide, The Best Materials for Eyeglass Frames: Pros, Cons, and Durability, for a more complete breakdown including titanium and mixed-material frames.
Frequently Asked Questions
Which material is most durable? +
TR90 is generally the most resistant to breaking under stress, thanks to its flexibility, while metal frames resist bending out of shape better than acetate over time.
Which material is best for sensitive skin? +
Titanium and hypoallergenic metal alloys are usually the best choice for sensitive skin or metal allergies; acetate is naturally hypoallergenic as well.
Are acetate frames heavier than metal? +
Generally yes, though modern acetate frames are engineered to keep weight reasonable while retaining the material's color and pattern advantages.
Does Shade Gray offer all three materials? +
Yes, our collection includes acetate, metal, and TR90-style frames across various shapes and sizes.
More Helpful Guides
Pick your material, then your style
Acetate, metal, and flexible TR90-style frames are all available starting at $49.