Baby Chair Belt Black Safety Belt Adjustable, One-Touch Buckle Thank you for viewing. I purchased this for baby/child chairs and strollers. I used it when eating out with my child. It was convenient for babies who could sit in a chair but might slip off the seat. I used it by threading the belt through the left and right supports of the chair and securing it with the moving buckle. I didn't have to check what kind of baby chairs were available when eating out. It was convenient to have this in my bag, it didn't take up much space, and it was easy.