What Our Gearhead® Experts Are Saying: "The Rail 2L Hip Pack is my go-to for 1–3 hour rides. It fits snug, never bounces, and breathes incredibly well. I love being able to carry two bottles on the sides without feeling bulky, and the one-handed phone pocket access is genius. It’s the perfect balance between minimalism and utility." We stay organized, hydrated, and balanced on every ride with the Thule Rail Hydration 2L Hip Pack. Engineered for all-day comfort, this low-profile hip pack keeps essentials close and secure, whether we’re hammering through singletrack or cruising mellow gravel roads. The side pockets fit up to two water bottles, while internal organization compartments keep tools, snacks, and accessories neatly in place. Breathable, lightweight materials deliver a stable fit that stays put on technical descents, and the structured rear pocket allows one-handed phone access without breaking stride. Reflective elements and a light attachment loop add visibility for early or late rides, while collapsible bottle pockets streamline the silhouette when hydration isn’t needed. Every Rail 2L pack is bluesign® certified, giving us confidence in its performance—and its environmental footprint.