Backpack Sizing & Materials
Harness Options:
- Flight Vest: Running-style vest, spreads load to core (most popular)
- Flight Shoulder: Traditional strap system
- S-Curve: Designed for women's fit
Find Your Torso Length
- Tilt head forward, find C7 vertebra (prominent bone at neck base)
- Have helper place tape at C7, follow spine's natural curve
- Place hands on hips, find iliac crest (hip bone "shelf")
- Measure to imaginary line between your thumbs
Pro Tip: Between sizes? Size up for best comfort. Broader chest near 17"? Choose Large.
| Shoulder Harness | Hip Belt | ||
|---|---|---|---|
| Size | Torso Length | Size | Waist |
| Small | Under 17" | Small | 26-29" |
| Large | 17" or Longer | Medium | 30-35" |
| Large | 36-50" | ||