Black Diamond Distance 4L Hydration Vest Ultra Blue, S

Whether you're gearing up for race day or another long training run, the Distance 4L Hydration Vest from Black Diamond is what we recommend to give ultra-runners and trail-enthusiasts the storage they need for a long day in the hills. Smaller and more speed-minded than the other packs in BD's Distance line, this vest still has lots of hydration storage and an over-the-shoulder trekking pole carry.