The Rail Hip Pack 4 is a hip bag from Thule that allows you to carry everything you need for the trails. Included is a 1.5-liter hydration bladder equipped with a magnetic ReTract tube return system. This ensures that the tube always finds its way back, allowing you to drink at any time without the worry of having to retrieve it from between the spokes. In the remaining storage space of the hip bag, organizational compartments securely hold tools and energy bars, and they are just as easily accessible as the phone, which has its own designated pocket.