What is that Loop on the Seat Belt For?

1984-1996 Jeep Cherokee 2 Door, Loop Ends

Seat Belt Buckle 2 (50mm) with 1 Loop Black

SEAT RING BELT - ベルト

M stripe seat belts (WAS: Cracks in the front seat belt guide loop?)

Petmate Seat Belt Loop Tether For Dogs - CountryMax

Wheelchair & Wrap-Around Belts

Petmate Seat Belt Loop Tether

What is the loop on the seatbelt that goes across your lap intended for? : r/subaru

1FS92BD1AB - Genuine Mopar Seat Belt-Seat Belt Turning Loop

Seat belt loop, is this normal?