1. Titanium Alloy Frame

• Pros: Ultra-light, comfortable for long-term wear, good toughness, not easy to deform, corrosion-resistant, anti-allergic.
• Cons: Higher cost, more expensive.
• Suitable for: Long-time daily wear, sensitive nose, people who pursue high quality.

2. TR90 Material (Ultra-light Plastic)

• Pros: Extremely light, soft, shatterproof, durable, cost-effective.
• Cons: Less premium feel than titanium alloy.
• Suitable for: Daily use, people who want lightweight and budget-friendly glasses.

3. PC Material

• Pros: High hardness, sturdy, shatterproof, not easy to deform, affordable.
• Cons: A bit heavier than TR90.
• Suitable for: Screwless designs, foldable styles, durable reading glasses.

4. General Metal Alloy

• Pros: Various styles, thin and good-looking.
• Cons: Heavier, easy to deform, may cause allergies for sensitive skin.
• Suitable for: Occasional wear, people who focus on appearance.

5. Screwless Design

• Not a material, but very important for structure.
• Pros: More stable, not easy to loose, not easy to break if dropped, longer service life.

One-Sentence Summary

• For comfort & high-end: Choose titanium alloy.
• For lightweight & cost-effective: Choose TR90.
• For sturdiness & durability: Choose PC material + screwless design.

https://scoolglasses.com/products/cat-eye-glasses-69-h6857