Knee Wedge MRI Positioners: 16" x 28.2" x 8". These New MRI Positioners are designed to conform to specific requirements for MRI compatibility and safety and are approved up to 3T. This unique visco-elastic material is specifically formulated to maximize patient comfort. Features a Permanent Antimicrobial Agent with cover seams sown using coated nylon thread to minimize the risk of any biological contamination. Positioner covering is a Breathable Waterproof polymer fabric that is easy to maintain and clean with any standard disinfectant. Positioners are resistant to stains and are Latex Free! Excellent radiolucent qualities.