Earth Day Special • Free Worldwide Shipping On Every Order
Celebrate Earth Day • 50% OFF Sitewide On All Running Gear


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Free standard shipping on orders
We are pleased to offer Free Worldwide Shipping on all orders, delivering to all countries and regions supported by our logistics network.
There are no restrictions on order quantity, parcel size, or shipment weight — every order ships at no cost to you. In addition, all customs duties, import taxes, and government-imposed fees associated with your shipment will be fully covered by us, ensuring you will not incur any extra charges upon delivery.
Please note that delivery times may vary due to local customs procedures and carrier conditions, but your shipping and customs costs will remain completely free under this policy.
We provide a secure and reliable Free Returns service for all customers. Items that remain unused and unopened may be returned within 60 days for a full refund.
All return shipping expenses, including customs-related fees, are fully covered by us.
Refund processing will be completed within 4 weeks from the date the return shipment is sent, regardless of whether the package has arrived at our facility. In general, refunds are finalized significantly earlier, ensuring a smooth and dependable experience.
Get ready for longer adventures with the Nathan VaporAiress 3.0 7L Hydration Pack.
One of the best hydration vests for women, the VaporAiress is body-mapped and designed specifically for the female form.
This women’s hydration pack works great with all body types thanks to its Adaptive-Fit™ Adjustable Sizing System. Two adjustment points let you alter the fit of the waist and bust separately for maximum comfort during your runs, walks, hikes and races.
The VaporAiress 3.0 is equipped with seven liters of storage and a two-liter bladder for water, so you can carry all of your essentials with you for a full day on the move. The large main back storage compartment is perfect for stashing all of your extra layers and gear, while the colorful bungee cords on the front shoulders and back panel give you even more storage. Plus, there are storage loops on the side for trekking poles.
Front shoulder pockets are big enough to carry water flasks up to 22 oz and two zippered storage pockets near the Adaptive Fit straps are ideal for valuables and electronics. There are also additional front zippered pockets.
Nathan redesigned the shoulder straps and back with a two-layer moisture-wicking air mesh that gives you more breathability and comfort during warm weather adventures.
With 360 degrees of reflectivity for visibility in the dark and a breathable, chafe-free fit, the Nathan VaporAiress 3.0 7L Hydration Pack is ready for long summer runs or a fun day in the woods.
| US Women | US Men | UK Size | EU Size | JP CM Foot Length | Inch Foot Length |
|---|---|---|---|---|---|
| 5 | 3 | 2 | 35 | 22 | 8.6 |
| 5.5 | 3.5 | 2.5 | 35.5 | 22.2 | 8.75 |
| 6 | 4 | 3 | 36 | 22.5 | 8.875 |
| 6.5 | 4.5 | 3.5 | 37 | 23 | 9 |
| 7 | 5 | 4 | 37.5 | 23.2 | 9.2 |
| 7.5 | 5.5 | 4.5 | 38 | 23.5 | 9.375 |
| 8 | 6 | 5 | 38.5 | 24 | 9.5 |
| 8.5 | 6.5 | 5.5 | 39 | 24.2 | 9.65 |
| 9 | 7 | 6 | 40 | 24.5 | 9.8 |
| 9.5 | 7.5 | 6.5 | 40.5 | 25 | 9.95 |
| 10 | 8 | 7 | 41 | 25.2 | 10.1 |
| 10.5 | 8.5 | 7.5 | 42 | 25.5 | 10.25 |
| 11 | 9 | 8 | 42.5 | 26 | 10.4 |
| 11.5 | 9.5 | 8.5 | 43 | 26.2 | 10.55 |
| 12 | 10 | 9 | 44 | 26.5 | 10.7 |
| - | 10.5 | 9.5 | 44.5 | 27 | 10.85 |
| - | 11 | 10 | 45 | 27.2 | 11 |
| - | 12 | 11 | 46 | 28 | 11.3 |
| - | 13 | 12 | 47 | 28.8 | 11.6 |
| - | 14 | 13 | 48 | 29.5 | 11.9 |
Note: Foot length measurement is the actual length of your bare foot. All running shoe brands fit slightly differently. Wide-width options are available for most styles. For long-distance training shoes, we recommend leaving 0.5 inch extra space for toe movement.
| US Size | Chest (Inch) | Waist (Inch) | Hip (Inch) | Height (Inch) |
|---|---|---|---|---|
| XS | 30–33 | 24–27 | 33–36 | 60–64 |
| S | 34–37 | 28–31 | 37–40 | 63–67 |
| M | 38–41 | 32–35 | 41–44 | 66–70 |
| L | 42–45 | 36–39 | 45–48 | 69–73 |
| XL | 46–49 | 40–43 | 49–52 | 72–76 |
| XXL | 50–53 | 44–47 | 53–56 | 75–79 |
Apparel Note: All athletic clothes feature 4-way stretch fabric for running mobility. Compression items fit snug; if you prefer loose fit, size up one grade.
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