Physical  Card storage/carry question?

Ref: https://support.apple.com/en-us/HT210399

According to this Apple Support article, the physical  Card, though made of titanium, is very fragile and needs to be handled with kid gloves. Since the article says to use only SOFT materials to store the card, could a Tyvek RFID credit card sleeve be considered soft enough or are there such sleeves made of softer material that are better?

Please disregard the Device & Topic settings as Apple hasn't added the physical  Card as a device yet, nor a topic for  Card, so I just picked something related for both.