The 3.5LS weighs 3.5 pounds and is designed for the golfer who loves Sun Mountain's popular 2.5+ but wants a few more features. Like the 2.5+ the 3.5LS is constructed with lightweight nylon fabric high-strength-to-weight plastic and carbon fiber legs. Adding a pound allowed us to use a thicker strap a more cushioned hip pad and to provide several more pockets.