The Pacsafe series was the original and Pacsafe's first. Like any first, it stays with you. It's smart patented 360 degree eXomesh locking system is an adjustable high-tensile stainless steel device that locks closed and locks to a secure fixture. Throw it on a variety of backpacks, soft-sided wheeled luggage or a duffle bag then lock it and leave it while you head out to meet the adventures that lay in wait.