For EDC

Your EDC Wallet Has a Gap. Here's the Fix.

September 2026 · 4 min read

You've optimized your EDC down to the last gram. Slim wallet, quality knife, reliable pen. But there's a scenario your gear doesn't cover: your phone is dead, you're separated from your group, and someone needs to reach you.

NFC tags and QR code stickers solve this if the reader has a phone, the right app, and working data. In every other case, they're a colored square on a card.

The Problem With Digital ID

Every "smart" ID product I've looked at has the same failure mode: it needs a device to be useful.

• NFC tags (Knock, TapMedID): The person reading it needs an NFC-capable phone and the right app. Most people don't have either in the moment that matters.
• QR code cards: Same problem, plus QR codes degrade with wear. Scan a faded QR at 2am in a parking lot? Good luck.
• Laser-engraved metal cards: Better than paper, but the engraving is a surface treatment. It wears, fills with dirt, and becomes illegible over time.

The common thread: all of them depend on something being on the card's surface. And surfaces degrade.

The Physical Solution

What if the text isn't on the card at all? What if it is the card?

A 3D-printed PETG card with the text physically cut into the material. No ink, no engraving, no sticker. The letters are voids in the plastic, the same way a coin's lettering is a physical feature of the metal rather than paint applied to it.

This matters for three reasons:

It Can't Fade

There's no pigment, no laser mark, no adhesive. The text is geometry, and geometry doesn't fade. You could leave this card in a sunlit window for a year and the text would be identical.

It Can't Wear Off

PETG is ductile. It deforms under impact rather than cracking. Pocket abrasion, key contact, the occasional drop on concrete: the card dents slightly but the text remains. There's no surface layer to abrade away because the text isn't a surface layer.

It Works Without Anything

No phone, no app, no NFC reader, no light source. The text is readable by touch in the dark (run your finger across the cutout letters). Any human being can read it. That's the whole point.

Specs

• Size: CR80 (85.6 × 53.98mm), standard credit card, fits any wallet slot
• Material: PETG, 0.8mm thick, 3mm corner radius
• Weight: ~4g (lighter than most metal ID cards)
• Text: Physically cut through both faces, readable by sight or touch
• Print settings: 0.2mm layers, 3+ perimeters, 100% infill (for STL buyers)

What Goes On It

Keep it minimal. This isn't a resume:

• Your name
• Blood type (if you know it)
• One or two emergency contacts with phone numbers
• Critical medical info (allergies, conditions), only if applicable

No address, no employer, no DOB. This card is for the person who finds it in an emergency, not for a data broker.

The EDC Case

You carry a knife because scissors might not be available. You carry a pen because ballpoints run out. You carry a GhostCard because your phone might be dead, cracked, or lost, and the person who needs to reach you won't have an NFC reader.

It's 4 grams. It fits in the same wallet slot as your cards. It costs less than a new blade. And it does one thing perfectly: tells someone how to reach you, with zero dependencies.