New, unused item with backing card. Inside sides: Aluminum. Bottom: Fleece lining. Although new, it was sold without being in a bag + it has only been handled by one person, so please only purchase if you are not overly concerned about the condition. Please be sure to read the profile before commenting. The profile will likely answer 90% of your questions, saving both of us unnecessary trouble. Waterproof packaging, and will be shipped via Yuu Yuu Mercari delivery. * Simple packaging in a宅配用ビニール袋 (delivery vinyl bag) or paper envelope.