Huzefa, I didn't realize that "state of the art" meant to modify the words "materials" AND "techniques."
I think the confusion lies in that both Ken and I thought you were saying that the techniques were simple to use, not that the Gear itself was simple to use. If you are referring to the Gear, which you seem to be, then yes, "is" is proper.
I would reword my original post to:
"Welcome! LESS GEAR WORKS™ designs and builds the Lightest Engineered backcountry gear on the planet. By utilizing State-of-art materials and techniques, we've created gear that pushes the limit of performance to weight ratio, while still remaining Simple to use. Our equipment helps you pack LESS."
**Sorry, I edited this last post like a gazillion times. But I promise, it's done, and in its final form :)