Features of the Ultimate Direction Ultra Vesta Hydration Vest Sliding rail sternum straps Front storage hold phone, fuel and valuables Stretch mesh pockets Are phone compatible Redesigned trekking pole holder minimizes bounce and snaps out of the way when not in use New Comfort Cinch Technology provides a custom Fit with easy on-the-go adjustment 4-Way stretch material with dissolved thread stretches to Fit more and is lighter than ever