Snug, stretchy, breathable running hydration vest with zero bounce. The pack has four easy access pockets on each shoulder strap, 2 zippered shoulder strap pockets and a zip pocket on the back, 2 pockets for soft flasks, and stuff pouches at the back. It is compatible with a 2L drinking system bag as well. 

A bungee sternum strap system lets you breathe fully while keeping the pack in place without flopping around while you run, and is infinitely adjustable. Modular bungee cords can be used to attach items like poles, or to add more compression. The pack has a signal whistle and reflective details for safety. Bluesign accredited, the pack is PFAS free and a certified ClimatePartner and Green Button product. Made of polyamide 4-way elastic mesh: durable, abrasion-resistant and lightweight.  

Size XS: fits chest circumference 76 - 82 cm
Size S: fits chest circumference 83 - 89 cm
Size M: fits chest circumference 90 - 96 cm