The elastic has stretched due to deterioration and is unusable. Please replace it or remove it. It can still be used even if removed. The hat does not contain any cotton. There are pockets on both sides. The items I am offering are unused, but they are pre-owned items stored at home, so there may be age-related deterioration. Please refrain from purchasing if you are sensitive to this or are looking for a perfect item. When shipping, I will fold the item as small as possible, so please be aware of any folding wrinkles. I will use recycled materials for packaging. Please understand that there may be folding wrinkles as the items are stored folded. As these are used items, please understand that there may be overlooked flaws such as fraying or stains before purchasing. For the sake of saving on shipping costs, the shipping carrier may be changed. (If it fits in a Yu-Packet Post Mini bag, it will be sent via Yu-Packet Post Mini.) Items with thickness may be compressed, so please be aware of this.