It is a smart watch strap that upgrade the functionality of classic watch with smart functionalities

Invis Strap is available in multiple standard watch strap sizes, so it can be fitted to most classic watches.

The size is defined by two parameters:

• lug width (the width at the watch case, e.g. 18 mm, 20 mm, 22 mm), and
• length - 125/75 mm

The electronic payment module embedded in Invis Strap is covered by a full 24-month manufacturer’s warranty.

Leather or textile parts of the strap are considered wear items, similar to a traditional watch strap, and are not covered as long-term components. However, the payment module itself is fully protected under warranty.

The electronics have been engineered specifically for daily wear. They are designed to withstand repeated bending and twisting, and have successfully passed durability tests exceeding 10,000 flex cycles without any loss of functionality.

Thanks to a flexible yet highly robust internal encapsulation, the module is fully waterproof and remains fully operational even during prolonged full immersion in water.

In practice, this means the technology inside Invis Strap is built to last well beyond everyday use, while the external strap materials can be replaced just like in any standard watch strap.

Yes. Contactless payments performed with Invis Strap are fully secure and are based on the same EMV security standards used by traditional contactless payment cards.

When you add your payment card to Invis Strap, your real card number is never stored or used directly. Instead, a secure payment token is created. This token is different from your card number and can be used only with your specific Invis Strap — it cannot be used online or on any other device.

The token is cryptographically bound to the individual Invis Strap, which means it cannot be copied, cloned, or transferred to another wearable. Each transaction generates unique, one-time cryptographic data, making replay or misuse impossible.

Even if your physical card details were ever compromised elsewhere (for example through a data breach at a merchant), this would not affect the security of payments made with Invis Strap.

In summary, contactless payments with Invis Strap offer the same level of security as a bank card — and in some aspects even higher — because the token used by the strap is device-specific and cannot be reused outside of the wearable.

No — in practice this scenario is extremely unlikely, and Invis Strap follows the same security model as standard contactless payment cards.

Invis Strap is an EMV-compliant contactless payment device, so identical rules apply as for a card:

• PIN protection: Above the contactless limit (defined by the bank/country), the terminal requires PIN entry. PIN verification is also periodically enforced after a series of small payments (so-called cumulative counters).
  
• Dynamic cryptography: Each transaction uses a one-time cryptographic code (dynamic cryptogram). Even if someone could technically “read” NFC data, it cannot be reused, replayed, or cloned to perform a valid payment.
  
• Terminal authentication & anti-fraud monitoring: A terminal must be properly registered with an acquiring bank and pass continuous anti-fraud checks. Any abuse leaves a trace and is subject to merchant liability and chargeback procedures.
  

Additionally, Invis Strap offers remote on/off control:

You can instantly disable payments in the app. The change is immediately propagated to the payment network (e.g. Mastercard), so the strap cannot be used — even if it is lost or stolen and even without having the strap physically with you.

Claims about “crowd scanning for €10–€50” typically confuse real threats. Industry reports show that actual NFC fraud involves compromised terminals, relay (“ghost tap”) attacks, or social engineering, not passive scanning of cards or wearables in pockets. Modern EMV cards and devices do not require RFID-blocking wallets for protection.

In short: Invis Strap provides the same level of security as your bank card, backed by network-level controls, real-time fraud detection, consumer protection rules, and the ability to switch payments off remotely.

No. Invis does not see where, when, or what you purchase when you use Invis Strap for contactless payments.

Invis only has technical information confirming that:

• 
  a specific Invis Strap is associated with a valid payment card, and
  
• 
  the strap is active and properly provisioned.
  

Transaction details such as merchant name, location, time, or purchased items are never shared with Invis. These data remain strictly within the banking and payment network ecosystem, just as with a standard contactless card.

This limited technical visibility exists only to:

• 
  enable customer support if you contact us, and
  
• 
  manage the secure operation of the device (e.g. activation, deactivation).
  

Your purchase history and payment behavior remain private and protected by bank-grade payment privacy standards.

Yes. You can connect the same payment card to multiple Invis Straps.

Each Invis Strap receives its own unique, device-specific payment token. This means:

• the same card can be safely used on more than one strap, and
  
• each strap is treated as a separate, independently secured payment device.
  

Tokens are cryptographically bound to each individual Invis Strap, so disabling or removing the card from one strap does not affect the others. You can manage each strap independently, including activation or deactivation if one is lost or no longer used.

This works in the same way as adding one card to multiple secure devices (e.g. different wearables or phones), while maintaining full payment security and control.

Yes. Your physical payment card can be used just as usual, it's just the wearable that is blocked from making payments.

It is your bank which decides at what amount you need to enter your PIN, regardless if you pay with your physical card or your wearable. Your PIN is required for larger purchases, but sometimes also for smaller purchases. You use the same PIN for your wearable as for your physical card. Contact your bank for further information.

All limits and restrictions are controlled by your bank, the same way as the physical payment card. Contact your bank for options.

If you don’t currently have a payment card from one of the banks we support, we recommend checking out the offer from our partner Curve (www.curve.com).

Curve allows you to easily link almost any payment card to Invis wearables. Through Curve, you can order a free virtual payment card. Simply visit Curve using the provided link, create an account, and then connect your existing payment cards to your new Curve card. All payments will then be charged to the card you selected within Curve.

This means that even if you don’t have a payment card from one of our supported banks, you can still order and use an Invis wearable.

• Download the Curve app (available on iOS and Android) and create an account. The process is free and takes only a minute.
• In the Curve app, add the payment cards you want to link. The setup is secure and straightforward.

Most likely, you are entering the PIN of your underlying bank card, not the PIN assigned to your Curve card.

When making payments with Invis via Curve, you must use the Curve card PIN, which can be found in the Curve app.

Before activating your Invis wearable, make sure that:

• your Curve account has been fully verified, and
  
• your phone number is registered in the Curve app.