Unlike most tubes that require anglers to form their own bends in the tube and hope the tube swims correctly, the SI Perfect Tube is unique in that it's 'pre-tuned' to fish perfectly right out of the package. And unlike inferior tubes with weak components of questionable quality, the SI Perfect Tube features top shelf ball bearing swivels and an interchangeable 3x strong assist hook rig, pre-sharpened. This tube can be fished at very slow speeds and will swim perfectly, including by anglers in kayaks.