Question 1

What is Arclin Kevlar and why use it for a phone case?

Accepted Answer

Kevlar is an aramid fiber, originally invented at DuPont and now produced by Arclin, that is roughly five times stronger than steel by weight. DEFF's DURO cases use genuine 1500D Arclin Kevlar fiber to create an ultra-thin case (from 0.65mm) that is also ultra-light (from about 11g), exceptionally strong, and has zero effect on cellular signal, NFC, or wireless charging.

Question 2

Do DEFF Kevlar cases support MagSafe and wireless charging?

Accepted Answer

Yes. Every DURO case supports wireless charging. The DURO Special Edition and DURO Ring Master models also add MagSafe magnetic support. Kevlar does not block wireless charging, NFC, or cellular reception.

Question 3

Are DEFF cases drop-tested and rugged?

Accepted Answer

The DURO Special Edition and Ring Master cases are certified to U.S. Military Standard MIL-STD-810H for drop protection, with reinforced raised edges that guard the camera and screen. The standard DURO case keeps a slim profile while still protecting against everyday drops and scratches.

Question 4

What is AGC Dragontrail Pro glass?

Accepted Answer

Dragontrail is a chemically strengthened glass made by Japan's AGC. DEFF's ULTRA HARD GLASS protectors use Dragontrail Pro for high scratch and impact resistance, finished with a multi-layer oleophobic anti-smudge coating and an included alignment tool for easy, bubble-free installation.

Question 5

What is the difference between ULTRA HARD GLASS, SUPER TOUGH GLASS and NANOCERAM?

Accepted Answer

ULTRA HARD GLASS uses premium AGC Dragontrail Pro glass in clear, nano-matte, anti-UV/blue-light and privacy options. SUPER TOUGH GLASS is triple-strengthened tempered glass rated 9H, as slim as 0.25mm, with in-display fingerprint-sensor support. NANOCERAM Premium Glass is DEFF's most impact-resistant protector, made from OHARA's nano glass-ceramic to flex and resist breakage.

Question 6

Should I choose a clear or matte screen protector?

Accepted Answer

Choose clear for the brightest, truest colors, ideal for photos and video. Choose matte (nano-matte) to cut glare and fingerprints with a smoother, paper-like feel that many people prefer for gaming and outdoor use.

Question 7

Will a DEFF screen protector work with in-display fingerprint sensors?

Accepted Answer

Yes. DEFF protectors for Samsung Galaxy, Google Pixel and other phones with under-display fingerprint readers are engineered to maintain fingerprint recognition through the glass.

Question 8

Does DEFF make cases for AirPods, Apple Watch and iPad?

Accepted Answer

Yes. DEFF offers DURO Kevlar cases for AirPods 3, AirPods 4 / 4 ANC and AirPods Pro 3; Apple Watch Series 4 through 11 and Apple Watch Ultra; and iPad mini 6 / 7, along with matching screen protection and accessories.

Question 9

How do I install a DEFF screen protector?

Accepted Answer

Each ULTRA HARD GLASS protector includes an alignment and installation tool for an easy, bubble-free application. Clean the screen thoroughly, use the guide to position the glass precisely, then let it self-adhere from the center outward.

Question 10

Which devices does DEFF support?

Accepted Answer

DEFF makes accessories for Apple (iPhone 15, 16 and 17 series, iPad, AirPods and Apple Watch), Samsung Galaxy (S24, S25 and S26 series), Sony Xperia (1 and 10 series), Google Pixel (9 and 10) and the Nintendo Switch 2.

Question 11

What does DEFF mean and where is the brand from?

Accepted Answer

DEFF is a Japanese accessory brand whose name reflects its philosophy, Design Evolution For the Future. The brand specializes in premium materials such as Arclin Kevlar, OHARA NANOCERAM, AGC Dragontrail glass and Toray carbon fiber.

Question 12

What car accessories does DEFF make?

Accepted Answer

DEFF's motoring line includes WIZ Arclin Kevlar smart key fob covers for Mercedes-Benz, BMW, Audi and Nissan; CNC-machined aluminum fuel cap covers; tempered-glass infotainment screen protectors for BMW, Nissan, Peugeot and Citroen; the Airput wireless-charging vacuum car mount; and the Toraysee Z microfiber interior cleaning cloth.

Question 13

Is DEFF affiliated with Nissan, BMW or other car manufacturers?

Accepted Answer

No. DEFF is an independent Japanese accessory manufacturer. Some DEFF display protection films are also sold through Nissan's own accessory catalog in Japan (Car Life Collection). Car brand and model names in product titles describe vehicle compatibility only and do not imply endorsement or certification by the car manufacturer.

Question 14

Will a DEFF car accessory fit my exact vehicle?

Accepted Answer

Fitment depends on the model, the generation and, for screen protectors, the display size. Check the model and generation code in the product title (for example LEAF ZE2 or Serena C28) before ordering. The standard Nissan fuel cap cover does not fit the Kicks, Note (E13) or Skyline (R32).

Question 15

What is the difference between the AG and AR coatings on DEFF car screen film?

Accepted Answer

AG (anti-glare) scatters incoming light to soften harsh reflections, while AR (anti-reflective) reduces the amount of light reflected from the surface, cutting flicker and ghosting. DEFF's car display film combines both.

Question 16

How do I clean a car display protector without scratching it?

Accepted Answer

Use a soft microfiber cloth such as Toray's Toraysee without detergent. Toraysee cloths are machine-washable and reusable.

Question 17

Are DEFF car accessories made in Japan?

Accepted Answer

DEFF's car display protection films are manufactured in Japan. The country of origin for other accessories is listed on each product page.

Question 18

Can I change or cancel my order after placing it?

Accepted Answer

Orders cannot be modified once placed, including the shipping address, contact details, quantity or color. If the order has not shipped yet, cancel it from your account page for a full refund and place a new order, or contact DEFF customer service for help.

Question 19

Why was my order automatically cancelled?

Accepted Answer

Orders may be cancelled automatically because of payment issues, items being out of stock or failed verification checks. Contact DEFF customer service for details.

Question 20

What if I placed a duplicate order by mistake?

Accepted Answer

Contact DEFF customer service right away to cancel the duplicate. Separate orders cannot be combined into one shipment after they are placed.

Question 21

What payment methods do you accept?

Accepted Answer

DEFF accepts major credit cards, PayPal and other local payment methods shown at checkout.

Question 22

Why was my payment declined?

Accepted Answer

Payments can be declined because of insufficient funds, incorrect payment details or bank authorization checks. Check with your bank or try another payment method.

Question 23

Does DEFF ship internationally?

Accepted Answer

Yes. deff.international ships worldwide. Available shipping methods, costs and estimated delivery times for your country are shown at checkout. Customers in Taiwan can also choose convenience-store (CVS) pickup.

Question 24

How can I track my order?

Accepted Answer

Once your order ships you receive a confirmation email with a tracking number. You can follow your parcel on the order tracking page at deff.international/apps/17TRACK or check the status in your account at account.deff.international.

Question 25

What is DEFF's return policy?

Accepted Answer

You can return any unused item in its original packaging within 14 days of delivery, for any reason, in every country. Return shipping is paid by the customer, except for defective, damaged or wrong items, where DEFF covers it. Custom or engraved items are excluded.

Question 26

Can I return part of my order, and how long does a refund take?

Accepted Answer

Yes, individual items can be returned. Approved refunds are issued to the original payment method within 14 days of DEFF receiving the return; banks may need extra time to post the refund.

Question 27

Do DEFF products come with a warranty?

Accepted Answer

DEFF products do not carry a separate manufacturer warranty. Defects are handled on a DOA (dead on arrival) basis: if an item arrives defective, damaged or incorrect, contact DEFF within 14 days of delivery for a refund or replacement, with return shipping covered. Statutory rights under local consumer law are not affected.

자주 묻는 질문

Arclin™ Kevlar®란 무엇이며 휴대폰 케이스에 사용하는 이유는 무엇인가요?

DEFF 케블라 케이스는 MagSafe와 무선 충전을 지원하나요?

DEFF 케이스는 낙하 테스트를 거쳤으며 내구성이 뛰어나나요?

AGC Dragontrail® Pro 유리란 무엇인가요?

ULTRA HARD GLASS, SUPER TOUGH GLASS, NANOCERAM™의 차이점은 무엇인가요?

투명 또는 매트(나노 매트) 화면 보호 필름 중 어떤 것을 선택해야 하나요?

DEFF 화면 보호 필름은 디스플레이 내장 지문 센서와 호환되나요?

DEFF에서 AirPods, Apple Watch, iPad용 케이스도 판매하나요?

DEFF 화면 보호 필름은 어떻게 부착하나요?

DEFF는 어떤 기기를 지원하나요?

DEFF는 무슨 뜻이며 어느 나라 브랜드인가요?

자동차용 액세서리

DEFF에서 어떤 자동차용 액세서리를 제작하나요?

DEFF는 Nissan, BMW 또는 기타 자동차 제조사와 관련이 있나요?

DEFF 자동차용 액세서리는 제 차량에 정확히 맞나요?

DEFF 자동차용 화면 보호 필름의 AG 코팅과 AR 코팅의 차이점은 무엇인가요?

자동차용 디스플레이 보호 필름을 긁힘 없이 닦으려면 어떻게 해야 하나요?

DEFF 자동차용 액세서리는 일본에서 제작되나요?

주문, 결제, 배송 및 반품

주문 후 주문을 변경하거나 취소할 수 있나요?

제 주문이 왜 자동으로 취소되었나요?

실수로 중복 주문을 한 경우는 어떻게 하나요?

어떤 결제 수단을 사용할 수 있나요?

제 결제가 왜 거절되었나요?

DEFF는 해외 배송을 하나요?

주문은 어떻게 추적할 수 있나요?

DEFF의 반품 정책은 어떻게 되나요?

주문한 제품 중 일부만 반품할 수 있나요? 환불은 얼마나 걸리나요?

DEFF 제품에는 보증이 제공되나요?