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Flex Series · GT Rebel

Flex One

Carbon Fiber Wallet

Front pocket architecture. Aerospace materials.

Carbon fiber exterior. K-Leather interior. Four cards and bills for the front pocket.

Same standard. Different pocket.

4.8 (5)
€199
VAT INCLUDED · SHIPS FROM PLOVDIV
RFID4 Cards + Bills5.5MM Closed46GTi HardwareMade in Bulgaria
In stock · Ships within 24h
2-Year
Warranty
RFID
Protected
Ships 24h
From BG
30 Days
Returns
Engineered
In Bulgaria
Aerospace
Grade Materials
Ships 24h
From Plovdiv
30-Day
Easy Returns

Why Flex Is Different

Most front-pocket wallets trade capacity for size. Flex keeps both.

Front pocket, re-engineered

A compact vertical bifold built for the front pocket. Narrower than a standard wallet, it sits flat and disappears. Same aerospace materials. Smaller footprint.

Permanent structure retention

Standard leather wallets stretch under card load and thicken within months. Flex uses a rigid carbon fiber layer that resists deformation permanently. The same profile on day one as on year five.

Zero bulk. Zero compromise.

Flex carries less than most minimalist wallets, while fitting more. No external clips, no elastic bands, no moving parts. Structural integrity from the material itself.

Built for decades, not seasons

ColdFire wallets are not fashion accessories. They are engineered carry tools, designed to outlast the trends, the brands, and the conventional wisdom that premium carry has to mean heavy carry.

Materials

Built from the best. No compromises.

Every component selected for performance and longevity. Nothing cosmetic.

Carbitex CX6
Carbitex CX6
Holds structure permanently.
Where leather fails under load.
K-Leather
K-Leather
Lighter. Stronger than expected.
10× tensile strength of standard cowhide.
Ti-6Al-4V
Ti-6Al-4V
Zero corrosion. Lifetime integrity.
DLC-coated Grade 5 aerospace titanium.
Dyneema®
Dyneema®
Ultra-strong lining.
Laser-cut. Tear resistant. Zero stretch.
Amann Strongbond
Amann Strongbond
Military-grade stitching.
PA 6.6 bonded thread. OEKO-TEX 100 certified. Stitches that outlast the leather.
RFID Data Armor
RFID Data Armor
Full-spectrum signal blocking.
Copper-nickel shielding. RFID and NFC protection.
Specs

The details

Dimensions85 × 102 × 7 mm
Profile7 mm
Weight46 g
Card capacity4 cards + 2 slip + outside
Bill compartment1 bill pocket (EUR unfolded / USD folded)
RFIDRFID Data Armor
HardwareTitanium logo plate
OriginPlovdiv, Bulgaria
Carry Profile

Compact. Vertical.

Strike
→
Back pocketJacketSuit
Full-size bills. Traditional bifold architecture.
You are here
Flex
→
Front pocketEDC
Compact. Vertical. Front pocket carry.
BladeX
→
SlimK-Leather
K-Leather exterior. Carbon fiber accent. The slim carry.
EDC
→
SleeveTravelMinimal
Stealth, Cipher, Navigator, Voyager.
Proof

The material behind ColdFire.

Every claim backed by engineering, not marketing.

Carbitex OmniFlex — Flexible Carbon Fiber
Carbitex CX6
Holds structure permanently under daily load.
Aerospace-grade flexible carbon fiber.
K-Leather
Lighter than calfskin. Stronger than expected.
3× tensile strength of standard cowhide.
Ti-6Al-4V Grade 5
Zero corrosion. Lifetime structural integrity.
DLC-coated aerospace titanium.
Flex Series

Front Pocket. Two Ways.

Same vertical carry. Different capacity.

Flex Air exterior
Flex Air
Minimal System
3-card compact
€165
Choose System →
Flex One exterior
Bestseller
Flex One
Daily Standard
4-card + bills
€199
Current
Compact shell. Personal system.
System
Flex Air
System StandardFlex One
Weight
42g
46g
ProfileClosed
5mm
5.5mm
ProfileLoaded
6.5–8mm
7–10mm
Cards
3
4
Bill compartment
Coin case
ID window
RFID Data Armor™
MaterialsCX6 · K-Leather · Ti · Dyneema
Handcrafted in EUPlovdiv, Bulgaria
In The Wild

CARRY IN
CONTEXT

Built for intention. Photographed in use.

THE BOARDROOM — lifestyle
THE BOARDROOM
AFTER DARK — lifestyle
AFTER DARK
ONE STANDARD. EVERY ENVIRONMENT.
COLDFIRE carbon fiber wallet in presentation box
Packaging

THE UNBOXING
EXPERIENCE

Every ColdFire arrives in a precision-cut presentation box with a custom-fit cradle. No loose padding. No excess.

Presentation box
Custom-fit cradle
Brand material cards
Founder-signed Certificate of Authenticity
GIFT-READY
No extra packaging required. Arrives gift-ready.
Reviews

PROVEN IN CARRY

Verified owners. Real carry.

FAQ

COMMON
QUESTIONS

Everything you need to know before you buy.

Yes. Every ColdFire wallet includes RFID Data Armor™. Full-spectrum RFID and NFC signal blocking built into the structure of the wallet. No removable insert. No separate sleeve needed.

4 dedicated card slots plus 2 slip pockets, 1 bill pocket, and 1 quick-access outside pocket. 46g, 5.5mm closed profile. Loaded with 4 cards: 7mm. Compact 85×102mm front pocket format.

Yes. The Flex One is designed specifically for front pocket carry. 85×102mm footprint, 46g, 5.5mm closed. Narrower than a standard bifold, disappears in any pocket.

Yes. The Flex One includes a dedicated bill pocket for EUR and USD notes. EUR banknotes fit full-size. USD notes require a single fold. Full carry capacity in a compact front pocket format.

Yes. ColdFire uses genuine Carbitex CX6 / Omniflex flexible carbon fiber. Not carbon fiber print or vinyl wrap. The same material used in aerospace and high-performance sports equipment.

2-year warranty on all orders. Covers manufacturing defects under normal use. To submit a claim, use the contact form on our website.

All three Flex models share the same front pocket form factor and exterior materials. The difference is interior architecture.

Flex Air · 2 card slots, ID window, outside pocket, no bills. 42g, 5mm closed, 6.5mm loaded. Minimal carry.
Flex One · 4 card slots, 2 slip pockets, bill pocket, no ID window. 46g, 5.5mm closed, 7mm loaded. Everyday carry.
Flex Ultra · 5 card slots, 2 slip pockets, ID window, outside pocket, bills. 58g, 8mm closed, 9mm+ loaded. Maximum carry.

Cards only. Choose Flex Air. Carry bills too. Choose Flex One. Maximum features. Choose Flex Ultra.

For traditional back pocket carry, see the Strike Series. Same materials, classic bifold form factor.

Strike Series is a full-size horizontal bifold, designed for back pocket, jacket, or suit carry. Full-size EUR/USD bills, traditional carry format. Flex Series is a compact vertical bifold, designed specifically for front pocket carry, narrower footprint. Both series use the same Carbitex CX6 flexible carbon fiber, K-Leather, and titanium hardware.

Carry With Intention

PERFORMANCE.
NOT VANITY.

Built for those who carry with intention.