The Mithril Kevlar Jacket is a softshell jacket made with Kevlar, that synthetic material you'll find in bulletproof vests. It can withstand pretty much anything you throw at it.
The jacket weights about 50% more than your average jacket, but it's also slightly warmer and super tough. It's extra wind resistant, water repellant, and wont rip or tear no matter what you're doing with it.
Of course, all this toughness doesn't come cheap, as this guy will set you back about $518. But hey, if you really do own it forever that works out to a pretty good deal.