The Gillette Mach3 has three blades progressively positioned to cut hair gradually closer, so for every stroke you take, it takes three. However, the five-blade shaving surface technology of Fusion5 has progressive blade geometry and a flexible comfort guard for a comfortable shave. The microfins precede the blades and smooth out the skin before the first blade cuts the first hair, so you get a close, comfortable shave. A lubrastrip is a thin strip that sits at the top of the razor, releasing lubricants while you shave, to produce a great glide. When you are no longer getting an optimal shave, the Lubrastrip fades to white, indicating that it might be time to change the blade.