What is FitFlow™?

At Sunday Shades, we don’t believe sunglasses should constantly need adjusting.

They shouldn’t slide down your nose. They shouldn’t distract you mid-movement. They should simply fit — and stay put.

That’s what FitFlow™ is designed to do.

FitFlow™ is our design system for fit and comfort — built for Asian facial features, engineered so your shades won’t slide, feel ultra-light, and flow naturally with you throughout the day, whatever you’re doing.

The Moment People Feel FitFlow™

Most people notice FitFlow™ the second they put the shades on.

“I’ve never had shades that don’t slide — until I tried Sunday Shades.”

“The fit is perfect. It just doesn’t slide off.”

“I love how it fits. I don’t even think about adjusting them.”

It’s not a dramatic difference. It’s a relief.

How FitFlow™ Stops Shades From Sliding

  • Designed for Asian-fit

    FitFlow™ starts with geometry. Nose bridges and frame curves are shaped to sit naturally on Asian faces, creating a stable foundation that prevents sliding from the start.

  • Anti-slide Grip

    Grip is placed where it matters — nose and temples — helping shades stay in place without clamping or discomfort, even when you sweat.

  • Featherlight by Design

    Heavier frames slide more. FitFlow™ uses lightweight construction to reduce downward pull, keeping shades comfortable and secure for hours.

Why “Won’t Slide” Matters More Than You Think

Sliding is the biggest reason sunglasses feel uncomfortable.

When shades slide:

  • You push them back up — again and again
  • They sit wrong on your face
  • They pull on your nose
  • They break your focus

FitFlow™ solves this at the design level — not with tight pressure, but with proper fit and balance.

The result?

  • No constant adjusting
  • No distractions
  • No second-guessing

Just shades that stay put and let you enjoy your day.