Timbuk2 Especial Medio Backpack - 1830cu in 500D Ripstop Cordura Nylon Imported Zipper closure 13" shoulder drop 21" high 12.5" wide Internal slip pocket fits up to a 15" MacBook Dual side stretch pockets fit water bottles or U-lock External compression straps for cinching or expanding Front panel unzips to expand volume for carting extra bulk Internal drop liner with seam tape construction You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it! Reflective binding Reflective logo print Reflective side quarter panels Expandable zippered external pouch (10 Liters) for helmet or other large items Dual side stretch pockets fit water bottles or U-lock Backbender flexible cooling panel offers ventilation and comfort Comfortbackpack strapswith hydration and headphone routing Water Resistant Internal drop liner with seam tape construction - for downpours we recommend using a rainfly cover