Product Description
Most hydration vests are designed for one body type and then resized down. You've felt the result: a fit that's never quite right, straps that gap at the chest, a silhouette that sits wrong no matter how many times you adjust it. Here's what most women runners don't realize: the vest isn't supposed to fight your body. The right one is built around it.
The Nathan AeroZip 1L Women's Hydration Race Vest is the exact carry system built for women who refuse to let poorly-fitted gear slow them down on race day.
- Women's-specific fit that actually fits. A precision women's silhouette with perforated four-way stretch woven fabric contours to your form, locked in without compressing, stable without restricting your breathing or arm drive through every mile.
- Two flasks, zero fumbling. Two oval-shaped 17oz Nathan x HydraPak soft flasks sit flush against your chest, shaped to contour your body for a flatter carry than round bottles. Pull one mid-stride, drink, tuck it back — 34oz always within reach.
- Zip on, zip off in seconds. A full front locking zipper replaces the pullover fight at race morning. Side elastic toggle cords let you micro-adjust the fit precisely to your torso before the gun goes off.
When a vest moves independently from your body, your core compensates on every stride, wasted energy you'd rather put into pace. The AeroZip's body-contouring fit eliminates that movement. Oval soft flasks collapse as you drink, removing the air pocket that causes sloshing. At 4.8oz without flasks, your body stops registering it as gear within the first mile.
Before your race: Fill both 17oz flasks, one water, one electrolyte mix, and load your mesh pockets with gels in order of use. Nothing to think about mid-race.
On course: Pull a flask one-handed, drink, return it without breaking stride. Repeat every 15–20 minutes.
Pro tip: Dial the side toggle cords at home before race day so the vest sits flush against your torso with no gap. Two minutes once — locked in every time after.
Women marathoners and trail ultrarunners who've switched from unisex vests consistently say the same thing: the women's-specific cut changes everything. The fit stays put, the chest pockets sit right, and the vest disappears within the first mile.
This isn't just another women's running vest. This is 34oz of on-board fluid in 4.8oz of gear, built around your body, so your only job is to run fast.
What Is the Nathan AeroZip 1L Women's Hydration Race Vest?
The Nathan AeroZip 1L Women's Hydration Race Vest is Nathan Sports' precision women's-fit, ultralight hydration vest built for marathon, trail, and ultra racing. Previously known as the Nathan Women's Stealth 1L, the AeroZip is the updated successor with refined specs: a full front locking zipper entry, two oval-shaped 17oz Nathan x HydraPak soft flasks, perforated four-way stretch woven fabric, and side elastic toggle cords for micro-fit adjustability. Total storage capacity is 1 liter / 61 cubic inches. Weight is 4.8oz / 137g without flasks and 7.6oz / 216g fully loaded.
Most vests in this category are unisex fits with a women's colorway slapped on them. The AeroZip Women's is actually cut for a woman's body, the silhouette, the chest pocket placement, the way it sits. That's not a small thing when you're at mile 20 of a marathon and the vest is either working with you or against you. This one works.
— Matt Johnson, Founder, The Feed
What You Get:
- Nathan AeroZip 1L Women's Hydration Race Vest
- Two 17oz / 500ml Nathan x HydraPak oval soft flasks
- Four expandable power mesh front pockets
- One zippered valuables pocket
- Side elastic cords with toggle locks
- Full front locking zipper closure
- Available in XS, S, M, L
For gear that arrives damaged or falls under the manufacturer's warranty: Please send a photo of the damage or error message to hello@thefeed.com. We will either help process a claim for the product and a replacement product or store credit will be provided, or we will direct you towards the correct place to make a warranty claim for the product. For returns on gear that you have used, we follow the manufacturer's instructions for satisfaction guarantees. This is specific to each gear product, terms and conditions may change.
Nathan AeroZip 1L Women's Hydration Race Vest FAQ's
Everything you need to know about Nathan AeroZip 1L Women's Hydration Race Vest.
The AeroZip 1L Women's is a precision women's-fit, ultralight running vest designed for marathon, trail, and ultra racing. It includes two 17oz oval-shaped soft flasks, a full front locking zipper, four expandable mesh front pockets, and a zippered valuables pocket. Total on-board hydration is 34oz across two independently accessible front flasks.
The AeroZip 1L Women's is the direct successor to the Nathan Women's Stealth 1L — same race vest philosophy, updated with a full front locking zipper, oval HydraPak soft flasks, and perforated four-way stretch fabric. If the Women's Stealth 1L was your vest, the AeroZip Women's is your next one.
The women's AeroZip features a precision women's-specific silhouette — a narrower shoulder line, contoured chest paneling, and a fit mapped to the female form rather than scaled from a unisex pattern. It runs XS through L versus S through XL on the unisex, and comes in women's colorways including Light Lime/Reflective Silver.
Two 17oz / 500ml Nathan x HydraPak oval soft flasks. They're shaped to contour your chest for a flatter fit than round flasks and collapse as you drink to eliminate sloshing. Total fluid capacity: 34oz across both flasks.
Hand wash or machine wash gentle cycle, cold water, air dry only. Heat degrades the stretch fabric and DWR coating. Rinse soft flasks after every use and air dry with caps open before storing.