Lezyne Composite Side Loading Flow Cage The Lezyne Flow Cage SL features a side loading design that allows easier bottle removal from one side without compromising overall bottle grip. Makes bottle access much easier in smaller compact frames. Lezyne uses a composite matrix material and features ovalized mounting holes to adjust the placement on the bike frame. Choose between left sided and right sided entry. To elaborate a bit more, left side loading means that the bottle cage is orientated so that the opening is on the left hand side. This makes grabbing the bottle with your left hand much easier. This also applies to the right hand version. On the right hand version the bottle cage is oriented so that the opening is on the right side, thus making it easier to grasp and reload. Features Composite matrix - 48g (claimed)Side-loading design- left or right Black or white | Lezyne | Composite Side Loading Flow Cage | Black | Right