Stretch Straps allow you to long-sit on a flat surface by extending the loops sufficiently to engage the feet. While they are widely used for relaxing on the ground or reading in bed, Stretch Straps are also recommended by back specialists to help stretch hamstrings and other muscle groups without compromising the low back. NOTE: Priced by the pair. Accessories only: they will not function without the back support. Color choice will default to Black unless you type “Navy” in the notes box at checkout.