A way cool alternative to a chair with a back or a stool.
It's a great way to have a back/breathing support to a chair without needing the back rest portion.
NADA CHAIR translates in Spanish to "NO CHAIR".
Use with poorly designed (most of them) auditorium, office, dining room and reception chairs.
Sit in bleachers for hours without effort.
Take to events where the sitting is causing your posture to lose your breath.
Below is one built into a vest. That's right, a vest. Others are separate from a vest.