Carry on Luggage is a type of luggage that a passenger can easily and efficiently carry personal belongings onto a plane. Often carry on Luggage has special pockets that make organizing passports and ID's simple and convenient.
About Zipper:
A zipper, sometimes called a 'slide fastener' is a device consisting of two toothed tracks or spiral metal or plastic coils, each bordering one of two edges to be joined, and a piece that either interlocks or separates them when pulled.