Nathan NS4527 Vaporairess Hydration Pack Running Vest with 2L Bladder

  • Description
  • Size Guide
  • Additional information


The lightest-weight women’s Race Vest option in our red-hot Vapor Series lineup brings the ideal balance of storage capacity, functionality, and weight to even the most demanding endurance athletes we work with. Trust us, our ladies tell it like it is!

  • Designed specifically to fit the female form
  • Over the shoulder load lifters keep water and gear close to the body for maximum no-bounce comfort
  • Body-mapped, super-breathable materials for maximum comfort
  • Equipped with a 2L bladder with quick-release valve
  • Two easy-access front bottle pockets
  • Front right stretch mesh stash pocket holds several gels
  • Front pocket with “wipe clean” surface for easy storing of gel empties
  • Water-resistant pill pocket
  • Front zip smart phone-compatible pocket
  • Side stretch mesh pockets fit most smart phones
  • Soft-touch, no-chafe elastic perimeter binding
  • Reflective hits for runs that last from dusk to dawn
  • Rear external shock cord for increased capacity
  • Size: S/M (31” to 36” / 78.7 cm to 91.4 cm in chest)
  • Size: L/XL (34” to 40” /  86.4 cm / 101.6 cm in chest)


  • FUNCTIONAL - Equipped with a 2L bladder - quick release valve system, Water-resistant pill pocket, and Two easy-access front bottle pockets (bottles not included)
  • DESIGN - Lightweight and comfortable - no bounce, breathable materials, and form fitting - equipped with Soft-touch, no chafe elastic perimeter binding
  • FIT - Vest fit is snug and overall sizing tends to run slightly on the smaller side, so it is recommended that anyone on the higher end of a given size may want to size up!
  • UNIQUE FEATURES - Reflective hits for runs in dusk/dawn, Side Stretch mesh pockets fit most smartphones, Rear external shock cord for increased capacity and trecking pole compatibility
  • SPACIOUS - Storage Capacity: 427 cu in/7 Liters without bladder; 305 cu in/5 Liters with bladder
  • IDEAL - Perfect for Marathons, Trail Running, Hiking, Cycling, Climbing, Outdoor enthusiasts, and Hydration-on-the-go!
  • SIZING-The sizing is based on a chest circumference measurement taken around the sternum and will be as follows: XXS 25-30in (63-77cm), XS 28-33 (71- 84cm), S/M 31-36 (79-91cm), L/XL 34-40 (86-102cm)

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Additional information




L-XL, LARGE/ X-LARGE, SMALL/ MEDIUM, X-Small, XS (28" to 33" / 71 cm to 84 cm in chest), XX-Small