What Our Gearhead(R) Experts Are Saying:"I love how low-profile the Hydraulics LS 1. 5L Reservoir is-it slides right into my running vest and stays secure without bouncing around. The bite valve is easy to use on the move, and the shorter hose makes it feel dialed for quick-access sipping without any excess slack."When we're logging fast miles in the mountains or ticking off long-distance training runs, we count on the Hydraulics LS 1. 5L Reservoir to keep hydration simple and efficient. Designed to integrate seamlessly with Osprey's running vests, this compact reservoir delivers low-bulk performance that won't slow us down. A shorter hose length cuts down on bounce and clutter, while the bite valve offers hands-free hydration with a smooth flow and a simple thumb-operated on/off lever. Lightweight and easy to load, it's an essential part of our kit-whether we're racing a skyline ridge or heading out for an all-day adventure on singletrack.