What is the difference between the semi-cover and full-cover versions?

The main differences between the two versions lie in protection and the overall handling experience. Semi-cover: Features exposed side buttons and an open-bottom design. It is lighter and slimmer, delivering a feel closer to the original phone. Ideal for users who prefer a more natural, minimal handling experience. Full-cover: Covers every edge and corner for more comprehensive daily protection. Ideal for users who prioritize added protection.

A18 Ultra Slim Particle Aramid Fiber Case for iPhone 18/17 Pro Series

A18 Ultra Slim Particle Aramid Fiber Case for iPhone 18/17 Pro Series

$69.98

Model:18/17 Pro Max

Color:Black

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• 1500D Aramid Fiber — dense woven aramid fiber combines lightweight strength with a refined tactile texture for everyday use.
• Full-Cover Protection — wraps around the sides, corners, and buttons for more complete protection while maintaining a clean, integrated profile.
• 1.2mm Slim & 27g Lightweight — engineered to preserve the slim feel of your iPhone without unnecessary bulk.
• Upgraded CoolHyper Cooling — a silicone thermal pad, aluminum heat sink, and honeycomb ventilation structure help transfer and release heat more efficiently.
• Aluminum Camera Guard — hard-anodized aluminum alloy protection helps reduce scratches and everyday wear around the camera area.
• Strong MagSafe Compatibility — built-in magnets provide stable alignment with compatible chargers, stands, power banks, wallets, and other magnetic accessories.

Aramid Matrix

Four distinct expressions of aramid fiber—from ultra-slim minimalism to full-cover protection.

Learn More

Redefined Design, Slim as Ever

A18 Ultra Slim Particle Aramid Fiber Case

1500D Aramid Fiber | Full-Cover Protection | Aluminum Camera Guard | Signature CoolHyper Tech | Ultra-Strong MagSafe

The Next Evolution of Aramid Fiber

A full-cover design wraps the edges and side buttons for more complete protection—while keeping the slim, lightweight feel of aramid fiber.

Full-Cover Protection

Seamless edge-to-edge coverage with reinforced corners for more complete everyday protection.

Built to Resist Wear

Hard anodizing reinforces the aluminum camera guard for enhanced wear resistance.

Microcosm · The Aesthetics of Particles

A gradient particle array meets fine-woven aramid fiber, creating a precise, futuristic texture with a lightweight technical feel.

⌈Light and Slim⌋ — The Answer

1.2mm + 27g = Barely There

CoolHyper, Upgraded for A18

A more direct thermal path brings the cooling zone closer to the CPU for faster, more efficient heat dissipation.

Keep Your Phone Always Cool

A18 dissipates heat faster to slow temperature rise and maintain a lower core temperature during demanding use.

Real-Time Temperature Monitoring

The temperature-sensitive color-changing strip helps you understand the device's status more intuitively.

Unbound Texture

Precision in Every Press

Smooth, responsive Camera Control for faster, more intuitive shooting.

Ultra-Strong MagSafe

Reliable MagSafe attachment keeps your setup secure across work, travel, content creation, and everyday use.

Product Specs

- Brand: aulumu
- Product Name: A18 Ultra Slim Particle Aramid Fiber Case
- Color: Black, Blue
- Material: Aramid Fiber, Aluminum Alloy
- Size: Pro: ~152*75.2*14.70mm; Pro Max: ~165.5*82*14.70mm
- Weight: Pro: ~27g; Pro Max: ~33g
- Compatibility: iPhone 18 Pro / 18 Pro Max / 17 Pro / 17Pro Max
*Manual measurements may have minor discrepancies; however, these variations will not impact their practical use.

Will the A18 Ultra Slim Particle Aramid Fiber Case be slippery? What does it feel like?

The A18 Ultra Slim Particle Aramid Fiber Case features a fine-weave texture and a skin-friendly coating. It is comfortable to hold, provides a secure grip, and is easy to clean.

Will the A18 Ultra Slim Particle Aramid Fiber Case affect cellular service, GPS, Wi-Fi, or Bluetooth?

No. Aramid fiber is not metal, so it does not normally interfere with Wi-Fi, cellular service, GPS, or Bluetooth signals.

Can the camera guard protect the lens properly?

Yes. The lens area is protected by a durable aluminum alloy frame that helps minimize wear caused by placing the phone on surfaces or from accidental sliding during everyday use.

Will the heat-sensitive color-changing strip keep changing color? Will it become less sensitive over time?

The strip uses a thermochromic material that changes color in response to temperature variations. The visible color change can vary depending on ambient temperature, the location and intensity of the heat source, and the amount of heat applied.

Will removing and attaching the A18 Ultra Slim Particle Aramid Fiber Case scratch the phone?

Generally, no. The case should not scratch the phone when installed and removed properly. We also recommend removing any dust or debris from both the phone and the inside of the case before installation.

How do I properly remove the A18 Ultra Slim Particle Aramid Fiber Case?

To avoid damaging your phone or the case, we recommend starting to remove the case from the upper-right corner.
Use your thumb to press down near the camera plateau and gently push the top-left corner outward and forward to detach the case from the phone.
After loosening the top-left corner, push out each of the remaining corners along the edges, one by one.