DuPont™ Tychem® BR offers wide-ranging protection backed by extensive fabric permeation barrier testing. Tychem® BR fabric provides at least 30 minutes of protection against more than 280 chemical challenges, including chemical warfare agents. Tychem® BR offers tear, puncture and abrasion resistant fabrics for lasting protection. Tychem® BR garments are designed for enhanced comfort and ease of movement. High visibility yellow.