Flex One · Schlanke Carbon-Geldbörse

4 dedicated card slots plus 2 slip pockets, 1 bill pocket, and 1 quick-access outside pocket. 46g, 5.5mm closed profile — 9mm loaded. 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.

5-year guarantee on all products. It covers manufacturing and materials, plus structural performance. If your wallet stretches, swells, or permanently loses its shape under normal use within its stated capacity, we will repair or replace it. To submit a claim, use the contact form on our website.

The surface of the carbon fabric is a thin polymer film bonded over the weave, not a brittle lacquer, so it does not chip, and keys or coins do not leave the marks you see on anodised metal. Over years of carry it can pick up fine surface marks like any material, but it does not stretch, swell or lose shape. Two things shorten its life: permanent overloading beyond the stated card capacity, which works the fold past its limit, and long exposure to direct sun. Carry within capacity and keep it out of prolonged UV, and it stays structurally the same for the life of the 5-year guarantee.

No. Carbitex CX6 / OmniFlex is a flexible carbon laminate, not a rigid molded plate. The fabric is engineered to bend and return flat thousands of times without a fatigue line, which is the whole point of using it instead of carbon plates. Creasing is not a failure mode we see in normal carry within the stated capacity.

Wipe with a damp cloth; mild soap for marks; air-dry away from heat. The K-Leather interior can take a standard leather conditioner from time to time, as any leather. No solvents, aggressive cleaners or sprays on either surface, and avoid leaving the wallet in direct sunlight for long periods.

All three Flex models share the same front pocket form factor, the same exterior materials and a quick-access outside pocket. The difference is interior architecture.

Flex Air · 2 card slots, 2 slip pockets, ID window, outside pocket, no bills. 42g, 5mm closed, 7–8mm loaded. Minimal carry.
Flex One · 4 card slots, 2 slip pockets, bill pocket, outside pocket, no ID window. 46g, 5.5mm closed, 9mm loaded. Everyday carry.
Flex Ultra · 5 card slots, 2 slip pockets, ID window, outside pocket, bills. 58g, 8mm closed, 12mm 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.