Bubble wrap to protect casing. Very nice and will buy again except this casing surface too smooth and I scare it can drop easily####[['nice', 'Overall#Overall', 'positive'], ['casing surface', 'Appearance Design#Grip Feeling', 'negative'], ['Bubble wrap', 'Product Packaging#Packaging Materials', 'neutral'], ['buy again', 'Buyer Attitude#Repurchase and Churn Tendency', 'positive']]