The ULTIMATE Federer bag is the Wilson Federer Super DNA 12 Pack Tennis Bag The bag itself is identical to the Federer DNA 12 Pack however it comes with a few extra goodies specially a solar panel battery and travel pillow Now you can recharge your battery on the go wherever you need It has many features that are perfect for elite players who take their game seriously The bag incorporates ThermoGuard 20 Technology which incorporates silica gel pellets into the construction for 226 more moisture absorption than a standard bag over a 4 hour period protecting your gear from the elements and preserving your strings Designed for the serious touring player the DNA12 Pack has space for up to 12 frames and a large compartment for holding shoes and apparel Additional accessory pockets store valuables securely and padded straps allow the bag to be carried as a backpack Molded plastic gives the bag the ability to stand upright on its own