Rail Hip Pack Thule’s Rail Hip Pack is a revolutionary hydration pack with the ReTrakt hose system to easily secure the drink tube while keeping your eyes on the trail. Whether you’re planning on going for a walk or smashing those tracks, the Rail Hip Pack is what makes an athlete pro. The 0.5L bag is capable of carrying up to two water bottles in the side pockets for longer rides. The one-handed, behind-the-back access to phones, keys, or any small personals in the soft structured pocket is what makes this bag unique and specific to riders. Ride in comfort and descend with confidence with superior stability and breathable materials that are made from weather-protective Nylon. The bag has enough room to organize tools, clothing accessories, or just more expensive things you don’t want to lose on your trek. There are numerous side pockets and interior ones which will secure all that you need. With Thule’s Rail Hip Pack your adventure will begin today!