CamelBak: Updated for 2019 to be even lighter, the redesigned Nano™ Vest is the preferred choice of Trail and Ultra runners looking for a minimal run vest. Updates include a lighter more minimal dual sternum strap attachment system that has integrated reflectivity, a removable safety whistle and a new 3D Micro Mesh that is lighter and more breathable. The new Nano offers a pack-only weight of less than 140-grams and includes two best-in-class 500 ml Quick Stow™ flasks. The updated 3D Micro Mesh enhances air flow and breathability while still offering great cushioning for added comfort and it comes in multiple sizes to ensure a personalized fit. It maintains the same streamlined gear organization you love, including a secure phone pocket, several stretch overflow pockets and it's signature trekking pole carry for accessing poles while running.FEATURES3D Micro Mesh: Multi-directional air flow and cushioning to maximize comfort and breathabilitySecure Phone Pocket: Conveniently located with a zipper closure for secured quick accessTrekking Pole Carry: Easily remove or replace poles while runningDual Adjustable Sternum Straps: Offer a range of adjustments for a custom fit and increased stabilityFuel and Gear Storage: Organize run essentials with pockets specifically designed for Quick Stow flasksReflectivity: For early morning or late-night runsStretch Overflow Pocket: Quickly stash a shed layer or rain shellSafety whistle: Extra assurance in case of an emergency SPECIFICATIONSCOLLECTION: RunningACTIVITY: RunUSER: UnisexHYDRATION CAPACITY: 1L/34 ozHYDRATION TYPE: Quick Stow™ Flask (x2)BPA/BPS/BPF FREE: YesGEAR CAPACITY: 1.5L/90 cu inPACK WEIGHT: 140g/4 ozDIMENSIONS: 35 x 19 x 7 cm / 13.8 x 7.5 x 2.8 inFITS TORSO: Fits a chest size of: S 71-86 cm/28-34 in M 81-101 cm/32-40 in L 96-116 cm/38-46 inACCESSORIES INCLUDED: 2 Quick Stow flasksNUMBER OF EXTERIOR POCKETS: 8