BioSmart is a patented bleach-activated technology that is engineered into the fabric that binds chlorine from your washer to the surface of the fabric. The chlorine then stops the growth and spread of bacteria. By using EPA-registered chlorine bleach, not “color-safe” bleach, this technology will kill 99.9% of common viruses and bacteria. Rather than having chemicals that wash out, every time you wash the fabric using bleach it reinforces the power of the antimicrobial qualities. The fabric also has a treatment that is a deterrent to fading so colors should stay crisp. BioSmart technology is durable to in excess of 75 industrial wash cycles.