Narthex made of light aluminum, horizontally and vertically adjusted. Has a front movable plate that fits sternum and one stable plate at the belly. Has a back plate that fits the ridge. Adjusted belt strap for better support.

References: Osteoporosis, Chest kyphosis, Replacement of cast, Osteomalacia.

S 75-85
M 85-95
L 95-105
XL 105-115