Ultimate Direction's original Ultra Vesta is no stranger to ultra marathons and endurance races, and the newly revamped Ultra Vesta 4.0 takes that same tried-and-true DNA while implementing a quickly adjustable fit system that keeps the pack more secure and comfortable than previous iterations of the Vesta. The fit system consists of two small bungee-like cords just below the back compartment that cinch the vest around the torso, keeping the vest snug, secure, and comfortable when you're scrambling up a steep ridge or maintaining a manageable pace along a rolling section of singletrack.