An orthotic device includes a frame having a first shell defining front and rear surfaces, and extending longitudinally into the anterior and posterior sides of the brace. The first shell defining an opening located on the posterior side of the brace. A tightening mechanism is mounted onto the first shell, and has a ratchet strap located along the rear surface of the first shell and a ratchet device mounted on the front surface of the first shell so as to extend partially into the opening and engage the ratchet strap. An elongate tensioning device having a first end portion is connected to the ratchet strap, and the first end portion of the tensioning device extends along the rear surface of the first shell. The tensioning device has a second end portion anchored to a portion of the frame. A channel is mounted to the rear surface of the first shell and entirely encloses at least a portion of the ratchet strap. The tensioning device is a textile-based and substantially inelastic strap.