There is some uncertainty about Israeli-manufactured blades using the name "Personna". ASR, the company that owns the rights to use that brand name in the US, claims only one blade (sold under a few names, including "Crystals" and "Navarro") as being legitimately a "Personna" blade. The "Red Pack Israelis", though they say "Personna", are not acknowledged by ASR. The blades (Red Packs and the Crystal variants) are made in the same facility but are different blades.

• Letterk's opus on the subject
  
• Review of Red Pack Israelis
  
• Review of Crystals
  
• Second review thread of Crystals / Israeli Personnas