Flexible design of vertical straps can be adjusted to increase / reduce the support to spine.
	The backrest fits into the natural curve of the back which can help avoiding excess pressure on spine.
	The effectiveness can be increased by using backrest together with seat mat
	It fits for office, car and home use.

Size：(W) 45cm X (H) 51cm (GF3L)
           (W) 47cm X (H) 60cm (GF3XL)

Colour：