FYI, Cardless won't mail a replacement card to anywhere except your home address
Lost my card in the airport at the start of a month long trip (nothing exotic, just visiting my parents domestically). App and website were erroring out when trying to get my card sent to my parents address. I called Cardless and they confirmed they can only send a replacement to your billing address. I was surprised by this (well, not actually), especially for a travel card. So if you're doing any kind of travel, definitely make sure you have a backup because Cardless will not help you out at all.