Thule Rail 4L is a smartly designed hydration hip pack that keeps you hydrated without skipping a beat on the trail.

The hydration pack that takes you farther, faster

The Thule ReTrakt hydration hose has a magnetic design which snaps automatically back in place in between sips. This helps you stay hydrated without taking your mind off the trail. This hydration hip pack also provides superior stability and breathable materials for a comfortable ride, and the reflective elements and bike attachment loops for visibility at night. Access your phone easily on the bike with one hand and store your tools and snacks in the organized internal pockets. This hydration pack is perfect addition to your 1-3 hour rides.

Locate and replace hydration hose without taking your eyes off the trail using the patented ReTrakt magnetic hose retention

Includes 1.5L hydration reservoir

One-handed, behind the back access to phone in soft, structured pocket

Ride in comfort and descend with confidence with superior stability and breathable materials

Organize tools and clothing accessories in interior pockets

Quickly access nutrition with side jersey pockets

Store additional small items in the front flap

Stay visible with reflective details and a light attachment loop