Gillette ProShield Replacement Razor Blades offer twice the lubrication when compared to previous models, maximizing comfort. In fact, the closeness of its shaving remains unmatched, soothing before as well as after the five blades touch the skin. Thus, these do not cause friction and are in great proximity to one another for a long-lasting shave. All in all, these refills suit the needs of sensitive complexions thanks to the various Microfins of its Flexible Comfort SkinGuard . In other words, this technology stretches/soothes the skin, while a micro-comb moves the hair in the right direction. At the same time, Gillette's traditional lubrication strip is wider and enriched with essential moisturizing agents, ensuring key protection. Unsurprisingly, the razor glides across one's face without much effort. Additionally, each one of these replacements contains a precision trimmer at the back. Finally, four units translate into about four months of regular and skin-pampering shaves! Characteristics Contains: four refills; Razors per blade head: five; Blade head features: lubrication strip with a Flexible Comfort SkinGuard , precision trimmer, five anti-friction blades and a micro-comb; Compatible with: all five-blade razors, except GilletteLabs' models. How to use Before using the Gillette ProShield Replacement Razor Blades, cleanse the face and spread your preferred shaving foam or gel. Switch for a new blade when the lubricating strip's color starts to fade or each razor stroke feels duller than usual. Press the button at the back of the cartridge for a smooth release. Then, slide the handle into the replacement refill and wait for a clicking sound. Finally, proceed with your grooming routine and wash/rinse the blade carefully.