The Epic XT 2.0 hydration pack is the solution for any adventure. Now coming in at 30 liters, this lightweight, energy-efficient, large-scale, hip-utilizing backpack is compatible with long or multi-day self-sustaining activities. Constructed from extremely durable fabric, the Epic XT 2.0 can be used in a variety of ways. This pack features a 2-type fiber system that helps wick away moisture during those long, hot adventures. The Epic XT 2.0 comes with a removable chassis. This frame, when inside the backpack, increases load capacity or can be removed for less strenuous efforts. It features many hidden pockets and the Max02 XT buckle system for long-term comfort and stability. One size.