Day Grear Backpack
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 Nathan Day Gear backpack is designed for athletes and adventurers looking for a lightweight, versatile, and comfortable pack. Ideal for running, hiking, or everyday use, it offers an excellent fit and optimized organization to safely carry your essentials.
Main features:
- Ergonomic design and comfortable fit
- Spacious main compartment with multiple storage pockets
- Breathable and padded shoulder straps for optimal comfort
- Adjustable chest strap for better stability
- Reflective elements for increased visibility in low light
Materials:
- Lightweight and water-resistant fabric
- Heavy-duty zippers
- Breathable mesh straps
Key features:
- Versatile for sports and everyday use
- Lightweight and adjustable design for optimal comfort
- Efficient organization with multiple compartments
- Increased safety thanks to reflective details
