Casadei is the Italian shoe house that invented the steel stiletto heel — the Blade — and has been making some of the most architecturally stunning, fiercely feminine footwear in the world since 1958. Victoria Beckham is their most famous devotee, wearing the Blade heels literally everywhere. What I love about Casadei is that this isn't just fashion — it's engineering. The tempered steel heel is actually more stable and comfortable than a regular stiletto because the metal doesn't flex. These are shoes built with genuine innovation and I am obsessed.