1.   Olsen zipped the bag shut.

2.   You can also zip the bag to another Kozi-tec model to create a double sleeping bag.

3.   Administrators and parents joined the flabby chorus, recommending that gym bags be forever zipped.

4.   After five minutes, the bag was zipped up.

5.   They unzipped the bags to check each little body for a pulse, then zipped the bags back up again.