Are Ballet Cold Storage cards durable?

Yes. Ballet Cold Storage cards were designed for long-term cryptocurrency cold storage, so we took great care to make sure that they are very durable. They are constructed of high-quality materials so that if you store your cold storage cards in a normal environment, you can have full confidence that it will last for generations. It will last much longer than any device with electronic components. The private key entropy is printed on a two-layer, tamper-evident stick that is sealed in a waterproof plastic coating, and the passphrase entropy is laser-etched onto the stainless steel card. But please be aware that they are not fireproof or resistant to corrosive chemicals.