This is a sound effect of a zip. It was recorded from the leather backpack.

Seven versions are included full:

File A – Zip (Version 1) 0:01
File B – Zip (Version 2) 0:02
File C – Zip (Version 3) 0:01
File D – Zip (Version 4) 0:02
File E – Zip (Version 5) 0:01
File F – Zip (Version 6) 0:01
File G – Zip (Version 7) 0:01