This lumblock lumbar-sacral brace acts as an immobilizing device for the lumbar-sacral region and its primary function is to reduce pain caused by lumbago, sciatica and ischialgia. Made with semi-rigid cotton fabric, it enjoys a structure made with eight self modeling and flexible steel stays on which a number of rigid straps slide. When the locking system is pulled and secured at the front, the inside straps stiffen the entire structure, thus effectively immobilizing the lumbar-sacral region. Practical and easy to wear, this lumblock brace perfectly adapts to whatever size and body type, thus ensuring maximum support and comfort at the desired tension. Through a new locking technology, operated by means of two crossing bands, the closing system is totally user friendly and allows a wide range of elastic tension settings. Although the rigidity of these braces has been remarkably increased, the comfort characteristics remain unaltered.