This gap filler is made from a neoprene material that provides the universal perfect fit for any car — just attach it to the seat belt catch once (it has a built-in slot) and it'll be set! You'll never have to worry about removing or readjusting.

Small (But Annoying) Problems Are No Match For These 34 Genius Products

Promising review:"I have to admit, my expectations weren't very high. I thought it was more of a joke when my husband got this for me for Christmas. Little did I realize that it would become one of my favorite gadgets ever! I don't know if I realized just how many things went missing in my seat gap. It has really saved a lot of things from disappearing into that black hole.It was easy enough to fit into my car and it's soft, acting just like an extension of my seat.There really isn't another product that compares to this." —Tessa Forbes

Get a pack of two from Amazon for $24.99.