Acetate frames are made from a high-quality plant-based plastic — they are thicker, bold in appearance, and available in a wide range of colours and patterns. They are ideal if you want your frames to make a visual statement. Titanium frames are ultra-thin, extremely lightweight, and hypoallergenic — the choice for men who want a refined, barely-there feel with maximum durability. TR90 frames are made from a thermoplastic elastomer that is highly flexible and impact-resistant — excellent for men who lead active lives or need a frame that can take the occasional knock without losing its shape. If style is your primary driver, choose acetate. If comfort and longevity are paramount, titanium or TR90 are the smarter pick.