The XLAB Super Wing is an aluminum version of the Carbon Wing. This is a great hydration system to keep the drag down to a minimum in back of you. If you are looking to get as aero as you can be, then you should consider a rear hydration system. You can get the optional X-Nut to hold your CO2 and there are various holes on the wing to get your hydration looking the way you want it. This system is very versatile. You can also get the Trisports.com bags to keep your goodies in them and keep them within and under the Wing with the optional XSW straps. These hydration systems are among the best that you can get and now with this aluminum version, they are more affordable than ever.