Nathan HPL #020 Stay light and hydrated as you run by wearing the Nathan HPL #020 Vest. With a repositioned bladder tube, the HPL #020 Vest ensures a comfortable wearing experience and convenient hydration. Lightweight fabric promises to keep you feeling light and fast. Easy-adjust system allows you to quickly put the running vest on or take it off. Wall mesh shoulder straps ensure a proper fit and the back panel channel enhances airflow so you stay cool and dry. Front pockets and two rear zippered compartments allow storage, great for your phone, keys, or on-the-go nutrition. Two-liter bladder holds water or your favorite sports drink. Adjustable/one size fits most.