Heard of Antibac or BacLock and wondered, huh? Well, let me explain. They are the same thing. Norwex trademarked Baclock. Now let me explain what Baclock is. Norwex has developed a unique technology that combines an antibacterial silver-based agent with microfiber. The antibacterial agent is embedded inside the tiny microfiber. The agent is solely designed to inhibit bacterial odor, mold, and/or mildew growth within the cloth as well as self-purification properties.