Hours from the next resupply on a mixed terrain day, the Lightweight Race Hydration Vest carries water, food, and a spare layer without feeling like a pack. This cycling hydration vest uses airmesh with full stretch so the shoulders move freely on the bike, and four front pockets plus one under each arm keep fuel within easy reach. The hose routes over either shoulder and parks on a magnetic clip between sips. What Our Gearhead(R) Experts Are Saying:"The vest stayed cool across my back and never bounced on rough roads, even with a full bladder and a spare layer packed in. I pulled a bar from a front pocket without looking and never broke rhythm."