We've updated our case series names. Edge (formerly Ultra-Slim), Cairn (formerly ProGuard), and Summa (formerly UltraGuard) now reflect the experience, not just the specs. Edge: slim, light, and sharp along the climb. Cairn: firm and dependable, like stone markers that guide the way. Summa: the peak, where protection and hand-feel come together.

The glowing part of the case is made from luminous materials that absorb energy when exposed to a bright light source, and then emits a soft glow in the dark.

The glow can last up to 20 minutes, depending on the intensity of the light source and how long the case was exposed to the light. Please note that the brightness will gradually decrease over time.

Avoid prolonged exposure of the luminous area to high-energy UV lamps (≥15W) for more than 3 minutes.
Do not store the case in environments exceeding 80°C for more than 3 months.

With proper storage and use, the luminous materials can last for at least two years.

1. Hold the case on the volume button side and push the top corner diagonally upward to release it.
2. For better grip, wrap the case in a paper towel if needed.
3. Click here to watch the removal video.
Click here to submit a return request if you need further assistance.