Dakine Shuttle Hydration Pack 6L Day Tripping Womens ModelNumber=K5069 The rear ramp supports the The rear ramp supports the rider better in steep up hill situations when seated and also improves your riding skills: To achieve the best possible traction your body weight needs to be transferred evenly onto the bike through the saddle which is why the 3D flexibility of the ergonomic core improves power transfer dramatically Pass through double bolting steel shackle provides anti twist protection The Womens Session stores two liters of vertical hydration features a dedicated fleece lined pocket for sunglasses internal organizer pockets and an integrated rescue whistle on the sternum strap list style position:outside