> It is normally recommended to use bubble wrap to protect SD cards in transit, but I have never seen bubble wrap inside a normal envelope which made me suspect

> It is normally recommended to use bubble wrap to protect SD cards in transit, but I have never seen bubble wrap inside a normal envelope which made me suspect that this would elevate the rate of delivery failure. There are envelopes with bubble wrap lining. All the Chinese stores use them and I see them more often than cardboard boxes.