Hoop earrings typically feature a closure mechanism that ensures the earrings stay securely in place. Common closure types include latch-back, hinged snap closure, and endless hoops. Latch-back closures have a hinged lever that snaps shut, providing a secure hold. Hinged snap closures have a hinge on the earring post that snaps into a groove on the opposite side. Endless hoops have a continuous loop without any visible opening, requiring the earrings to be threaded through the earlobe.