Zipcord fiber optic cable is a duplex type fiber optic cable. Its structure is just like two simplex cables jointed together side by side, you can split the zipcord fiber cable apart by hands and it will become two simplex fiber optic cables. Below is a picture of the zipcord fiber optic cables structure:

Zip cord fiber cable is usually used in indoor applications, especially on fiber optic patch cables. These zip cord fiber optic cables can be single mode or multimode and with various kinds of connectors. Usually on the zipcord cable, each side is two connectors, and the two connectors may be joined together by a clip, especially on LC and SC types. This clip is removable simply by hands.