What Our Gearhead(R) Experts Are Saying: "This sleeve is a huge upgrade for long, hot rides. It keeps my water from turning lukewarm halfway through, and it works just as well in winter to keep things from freezing. It fits both 2L and 3L bladders easily and slides right into my VST pack without adding bulk." We count on the USWE VST Bladder Sleeve when we need our hydration to stay at the right temperature from the first mile to the last. Built to insulate both 2-liter and 3-liter bladders, this sleeve maintains a stable temperature through heatwaves, cold snaps, and everything in between. Whether we're grinding through exposed desert trails or navigating winter singletrack, it keeps water drinkable and refreshing when we need it most. Designed to integrate cleanly with VST hydration setups, the sleeve adds dependable thermal protection without extra bulk. It's a simple addition that goes a long way-helping us stay focused on the ride, the run, or the mission ahead, not the state of our hydration.