Shimano Rokko R12 All Around 12L Hydration Pack. Able to handle weekend rides in the hills as well as weekday jaunts in the city, the Shimano Rokko R16 Hydration Pack is the ultimate all rounder. With its spacious 12 liters of storage capacity, room for a hydration bladder not included, plus ventilated back panel and shoulder straps, this pack has all the bases covered regarding functionality, comfort, and organizational excellence. Storage capacity abounds courtesy of a main compartment that provides ample room for gear and extra clothing plus a sleeve for a hydration bladder, a felt lined valuables pocket, a smaller pocket with a key clip, 2 mesh side pockets, as well as 2 pockets on the waist belt. There's also the means to carry a Bicycle Helmet when in transit to the trails as well as an eyewear holder on a shoulder strap. Additionally, reflective accents and a tail light loop will help keep you visible in low light conditions.