All gear in your possession (including gifts, unlocked slot-machine prizes etc) may be found in the corresponding sections of the Shop.
To enter the Shop, please click on the Shop icon at the top of the game screen:
When you enter the shop, you will see gear on the left and your character on the right:
Parts of gear in your possession do not have any frame on it. The framed parts of equipment should be unblocked by obtaining certain level or defeating a certain cadaver.