25 oz Soft Flask with Tube - Unisex
Guide only. Tap cm or in to switch units.
Vests - unisex / men
One sizeSternum 56 – 114 cmSternum 22 – 45 in
Vests - women
| Size | Sternum | Bust |
|---|---|---|
| XXS – M | 66 – 84 cm26 – 33 in | 76 – 91 cm30 – 36 in |
| L – XXL | 84 – 104 cm33 – 41 in | 94 – 112 cm37 – 44 in |
| 1X – 3X | 104 – 127 cm41 – 50 in | 114 – 130 cm45 – 51 in |
Most Nathan vests are one size and adjust with the straps. Hydration belts too.
Reflective vests
| Size | Sternum |
|---|---|
| S / M | 61 – 102 cm24 – 40 in |
| L / XL | 96.5 – 114 cm38 – 45 in |
Worn over your layers. Between two sizes, take the larger one.
Tops - men
| Size | Chest |
|---|---|
| XS | 86 – 91 cm34 – 36 in |
| S | 94 – 99 cm37 – 39 in |
| M | 102 – 107 cm40 – 42 in |
| L | 109 – 114 cm43 – 45 in |
| XL | 117 – 122 cm46 – 48 in |
| 2XL | 124 – 130 cm49 – 51 in |
Nathan publishes chest measurements only.
How to measure
Sternum: arms relaxed, measure just below the chest bone, tape parallel to the floor.
Chest / bust: measure the fullest part, tape parallel to the floor.
All prices are displayed including taxes.
The amount shown is the final price you pay at checkout (shipping fees may apply).
Free shipping on all orders of $200 or more, in Canada and the United States.
Orders ship within 48 hours.
Enjoy 14-day returns after delivery.
Items must be new, unworn, and with original tags attached.
All prices are displayed including taxes.
The amount shown is the final price you pay at checkout (shipping fees may apply).
Free shipping on all orders of $200 or more, in Canada and the United States.
Orders ship within 48 hours.
Enjoy 14-day returns after delivery.
Items must be new, unworn, and with original tags attached.
All prices are displayed including taxes.
The amount shown is the final price you pay at checkout (shipping fees may apply).
Free shipping on all orders of $200 or more, in Canada and the United States.
Orders ship within 48 hours.
Enjoy 14-day returns after delivery.
Items must be new, unworn, and with original tags attached.
Why this price?
- Samples and overstock from major brands
- New products
- Limited quantities – no restock
The Soft Flask 25 oz with Tube - Unisex is a 25 oz flask with a tube, allowing you to drink without having to remove it from your hydration vest pocket.
Key features
- 25 oz capacity, approximately 740 ml
- Integrated drinking tube, allowing hydration without breaking stride
- Flexible construction that compresses as the flask empties, reducing sloshing
- Designed to fit in the front pockets of running hydration vests
Highlights
✓ More volume than a standard running flask
✓ Tube eliminates the need to remove and replace the flask with each sip
✓ Compresses as it empties, without sloshing or bouncing
✓ Fits into the front pocket of a hydration vest
✓ A simple solution to extend your autonomy during runs
