Blut

Blut (血装 (ブルート), burūto; German for "Blood", Japanese for "Blood Guise"): A Quincy version of the Arrancar Hierro, it gives the user inhuman durability.

Overview
Blut is a special ability, used by the Quincy, that affords them inhuman levels of defense, similar to an Arrancar's. Using it, a Quincy can survive even a severe broken neck, along with other fatal wounds, much like Shinigami do, despite being Human.