Frequently Asked Questions
1. Will the Kevlar aramid case turn yellow?
Dark and classic woven colors: hardly ever yellow — the material is chemically stable, oxidation-resistant, and corrosion-resistant to sebum, maintaining its color over the long term. A small number of light-colored materials may yellow depending on the severity of users’ sweat.
Official statement for light-colored cases (standard answer):
Light-colored aramid fiber has a highly transparent base tone, and the yellowing is not caused by coating degradation. However, due to the micron-level woven pores in the fiber, prolonged contact with sweat, sebum, and everyday stains may slightly infiltrate the fiber surface, resulting in natural wear marks.
This is normal wear and tear for light-colored natural materials and is not a quality issue. It is a common characteristic of all light-colored Kevlar cases across all brands, not a product defect.
✅ Care tip: Regularly wipe with alcohol wipes to effectively clean stains and slow discoloration. For maximum stain resistance, priority should be given to dark-colored models.
2. How is it different from regular silicone, glass, or clear cases?
• Silicone cases: bulky, sticky, dust-magnetic, sweat-absorbing, prone to deformation
• Glass cases: heavy, shatter-prone, signal-blocking, poor heat dissipation
• Clear TPU cases: yellow quickly, show white wear marks, look cheap
• WKWU aramid cases: slim + durable + cool + signal-friendly + long-lasting like new — without any of the drawbacks of ordinary cases
3. Does it affect phone signal or wireless charging?
Not at all.
Aramid fiber is a non-metallic inert material — zero signal shielding. 5G, Wi-Fi, GPS, and Bluetooth remain stable at all times. The ultra-thin case offers no obstruction, supporting full-speed wireless charging and normal use of magnetic accessories.
4. How effective is the drop protection?
WKWU features a dual protection structure: fiber cushioning + raised edge protection.
Unlike hard cases that rely on rigid impact or soft cases that offer no support, aramid fiber dissipates impact forces through fiber tension. It handles daily drops, bumps, and corner impacts with ease — delivering reliable high-strength protection in an ultra-slim form.
5. Does it attract fingerprints or sweat marks?
The surface nano oleophobic coating offers far superior resistance to fingerprints, sweat, and oil compared to ordinary cases. Stays dry and clean even under heavy use, without unsightly fingerprint buildup. Easy and quick to clean.
6. Will the case deform, pill, or shed?
WKWU uses high-temperature, high-pressure integrated molding with high-density weaving — the fibers are tightly locked, and genuine aramid fiber is highly resilient. Under normal use, it will not pill, shed, deform, or sag — eliminating all common defects found in cheap blended cases.
7. Which phone models are compatible? Are the cutouts precise?
All models feature custom 1:1 precision molds with precise cutouts, raised lens and screen protection, comfortable button feedback, and a snug fit — no film lifting, no looseness, no edge curling. Compatible with all current iPhone models and major Android flagship devices.
8. Is it suitable for long-term use?
Aramid fiber is an ultra-durable industrial-grade material with exceptional resistance to aging, corrosion, and wear. Under normal use, it can last for several years — 3 to 5 times the lifespan of ordinary phone cases. It is a “buy once, keep for years” high-end durable accessory.
