The Gillette Razor Brand is a popular brand of razors and other grooming products. The brand includes three distinct razor models: ATRA, TRACII, and SENSOR. ATRA stands for All-Terrain Razor, which is designed to provide a close shave in any environment. TRACII stands for Twin-Razor Action and Indicator Lubricating Strip, which is designed to provide a smooth and comfortable shave. Finally, SENSOR stands for Smooth Ultra-Thin Refillable Cartridge, which is designed to provide a close and comfortable shave.