The present invention includes an orthotic brace which offers advantages in being able to be adjusted to fit the small of the back of a specific wearer, and may be altered to be converted from a smaller LSB-type brace or a larger LSO-type brace, and may have optional ventral supports removably attachable thereto. The present invention also includes a thoraco-lumbo-sacral orthopedic (TSLO) brace variant featuring a supplementary sternal support adapted for ease of donning and removal once its strap system is fitted to the wearer.