How to Choose a Backpack
REI Co-op Flash 45 Pack
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The streamlined REI Flash 45 Pack balances minimal weight with maximum comfort and convenience. It's the perfect companion for a long weekend of fast and light backpacking.
Shop similar products- Molded, mesh-covered EVA back panel rivals heavier packs with its comfort and ventilation; shoulder straps are made with perforated foam, allowing sweat vapor to pass through
- Aluminum headrail teams up with 2 flexible Delrin rods to offer genuine load transfer to the hips, which is virtually unheard of in a pack this light!
- Spacious main compartment features a hydration sleeve (reservoir sold separately); floating top lid extends to accommodate bulky items and larger loads
- Floating front pocket offers adaptable and generous storage, fitting a wide array of contents such as rain gear or water bottles
- Zippered hipbelt pockets offer immediate access to snacks and other small items
- Lightweight lash points allow additional gear to be strapped to the outside of the pack; quick-clip bungee loops let you secure an ice axe or trekking poles
- The REI Flash 45 Pack features side and top compression straps that help pull the load close to your body and provide attachment points for additional gear
- Special Buy
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
| Best Use | Backpacking |
|---|---|
| Frame Type | Internal Frame |
| Ultralight | Yes |
| Material(s) | Ripstop nylon |
| Frame Material | Aluminum headrail/Delrin POM side rails |
| Number of Stays | 1 peripheral hoop |
| Pack Access | Top |
| Number of Exterior Pockets | 6 + main compartment |
| Gender | Unisex |
| Sustainability | From a Climate Label Certified brand |
Buying Advice
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.
