The server is denying access to the resource as a consequence of a legal demand. Named after Ray Bradbury's novel Fahrenheit 451, the temperature at which paper burns.
The Levi's 451 is a vintage straight-leg style from the 1990s, now long discontinued. If you find a pair, you've found a collector's item — a relic of a simpler denim era.
Search on eBay ↗This content has been legally torched at Fahrenheit 451 — and these jeans are so vintage they might as well be a banned book. The HTTP 451 was named after Bradbury's dystopian novel, and the Levi's 451 vanished from shelves like a book from a censored library. You can't access this page, and you can't buy these jeans. Some things are just unavailable, legally or otherwise.