Coldcard: The OG's choice. Air-gapped, focused only on Bitcoin, feels like a tank. If you're maxi and paranoid (in a good way), this is it
All hardware wallets must be airgapped, not onnly Coldcard hardware wallet.
The main purpose of hardware wallets is to keep your Bitcoin private keys offline, and you don't have to open your wallets with private keys online to sign a transactions. It's biggest difference of hardware wallets and hot wallets.
It's not correct if you said like only Coldcard hardware wallet is airgapped.
Hardware wallet security.A hardware wallet is a small device that you connect to your computer when you want to send and receive bitcoins. However, all of the private keys are stored inside the device and are never exposed to the Internet.
As a result, you're disconnecting your private keys from the Internet and protecting your bitcoins from digital attacks. So the only way someone can steal your bitcoins is if they can get physical access to your device (or seed).