Its a well-known fact that driving can aggravate lower back pain. So, whether you already suffer or want to pre-empt the possibility, fit these bubble and magnet seat covers. Raised, moulded foam domes stimulate circulation with a rolling massage effect, reducing back tension, aches and pains. Strategically-placed magnets add to the therapeutic concept. Lightweight and easy to install and remove, with an elastic strap for use on other chairs. H93 xW45cm. Not suitable for people with pacemakers.