Replace with true Panasonic parts. It is recommended that you replace the outer foil at least every year to maintain your shaver's cutting performance

Panasonic Replacement Outer Foil and Inner Blade for ES-LA63-S and ES-LA93-K. It is recommended that you replace the outer foil at least every year to maintain your shaver's cutting performance and the inner blade every two years

How to use - Simply remove the worn foils and snap the new ones into place