Details: Dual floating foil shaver head replacement for the Lifeproof and Smart shaver with both symmetrical and asymmetrical foil patterns to lift and cut hairs no matter which direction they are growing to give you the best shave with the fewest passes. These replacement foils are fully washable, hygienic, and are stainless steel which allows for easy clean up and accurate cutting results. The bi-directional long hair cutter bar will help shave your long hairs even after 3 to 4 days of growth which will help provide unbeatable shaving results. This shaver replacement head will help return your Wahl shaver back to its original 100% cutting performance, it’s like getting a new shaver again. We recommend replacing the heads about once a year, in some cases every year and a half is acceptable, this is all dependent upon usage. Note: We test our shavers for cutting performance prior to packaging with a hygienic fiber. We do our best to clean the product to remove any testing particles, but it is possible a few may remain. They are not hair and can be simply wiped off.