Brand new black diamond distance 4 hydration vest, optical yellow, size small If you are a runner, hiker, Nordic skiier etc and you don’t have one of these I’d 10/10 recommend. I ended up with two of these and I can honestly say I use my other one almost every day. Take it with me when I travel. It’s so handy & comfortable. Engineered to go far fast, the Women's Distance 4 Hydration Vest a women's specific fit running harness suspension system. Includes features key for your long runs, like an over the shoulder Z-pole carry system, quick access side pockets, and dual flask pockets.