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 stretc...