
REI Co-op Flash 18 Pack
When a quick ascent demands unburdened movement and essential carry, the REI Co-op Flash 18 Pack comes into its own, virtually disappearing on your back. This featherlight 10-ounce companion, crafted from robust recycled ripstop nylon that shrugs off light moisture, is built for spontaneous pushes to the ridge or a nimble day exploring new terrain. Its smart 18-liter capacity perfectly corrals a rain shell, a hydration reservoir within its internal sleeve, and trail snacks, while external stretch-mesh pockets keep water bottles and maps instantly accessible.Ā
Ā
PRODUCT CONDITION
Ā
This UnNew REI Co-op Flash 18 Pack is in Excellent condition.Ā
Ā
Products in Excellent condition have seen minimal use and wear. Any imperfections are purely cosmetic and do not affect the intended performance of the product.Ā Ā
TECH SPECS
- Recycled ripstop nylon fabric features a durable water repellent (DWR) finish made without PFAS to help moisture bead up on the surface
- Waistbelt and sternum strap can be detached to save weight, bringing total pack weight down from 9.5 oz. to 7.7 oz.
- Hydration-compatible design includes a hose exit port and an internal sleeve with a hang loop for a reservoir (reservoir not included)
- Back panel is lightly padded; pad slips out for use as a sit pad
- Breathable mesh shoulder straps have fold-over padding that softens contact with your neck and shoulders
- Single-handed, quick-pull drawcord with small weather flap seals the top
- Zippered side pocket for easy access and added security
- Sunglass loop on left shoulder strap lets you hang your shades
- 2 interior slip pockets
- Exterior loops can be used to lash on extra gear, add compression or tie the Flash 18 to a larger pack
- For use in your larger backpack or duffel, this pack converts into a stuff sack simply by turning it inside out
- Tool loop with tuck-away pocket
- Product meets the bluesign criteria
- 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
Original: $23.85
-65%$23.85
$8.35More Images

REI Co-op Flash 18 Pack
When a quick ascent demands unburdened movement and essential carry, the REI Co-op Flash 18 Pack comes into its own, virtually disappearing on your back. This featherlight 10-ounce companion, crafted from robust recycled ripstop nylon that shrugs off light moisture, is built for spontaneous pushes to the ridge or a nimble day exploring new terrain. Its smart 18-liter capacity perfectly corrals a rain shell, a hydration reservoir within its internal sleeve, and trail snacks, while external stretch-mesh pockets keep water bottles and maps instantly accessible.Ā
Ā
PRODUCT CONDITION
Ā
This UnNew REI Co-op Flash 18 Pack is in Excellent condition.Ā
Ā
Products in Excellent condition have seen minimal use and wear. Any imperfections are purely cosmetic and do not affect the intended performance of the product.Ā Ā
TECH SPECS
- Recycled ripstop nylon fabric features a durable water repellent (DWR) finish made without PFAS to help moisture bead up on the surface
- Waistbelt and sternum strap can be detached to save weight, bringing total pack weight down from 9.5 oz. to 7.7 oz.
- Hydration-compatible design includes a hose exit port and an internal sleeve with a hang loop for a reservoir (reservoir not included)
- Back panel is lightly padded; pad slips out for use as a sit pad
- Breathable mesh shoulder straps have fold-over padding that softens contact with your neck and shoulders
- Single-handed, quick-pull drawcord with small weather flap seals the top
- Zippered side pocket for easy access and added security
- Sunglass loop on left shoulder strap lets you hang your shades
- 2 interior slip pockets
- Exterior loops can be used to lash on extra gear, add compression or tie the Flash 18 to a larger pack
- For use in your larger backpack or duffel, this pack converts into a stuff sack simply by turning it inside out
- Tool loop with tuck-away pocket
- Product meets the bluesign criteria
- 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
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
When a quick ascent demands unburdened movement and essential carry, the REI Co-op Flash 18 Pack comes into its own, virtually disappearing on your back. This featherlight 10-ounce companion, crafted from robust recycled ripstop nylon that shrugs off light moisture, is built for spontaneous pushes to the ridge or a nimble day exploring new terrain. Its smart 18-liter capacity perfectly corrals a rain shell, a hydration reservoir within its internal sleeve, and trail snacks, while external stretch-mesh pockets keep water bottles and maps instantly accessible.Ā
Ā
PRODUCT CONDITION
Ā
This UnNew REI Co-op Flash 18 Pack is in Excellent condition.Ā
Ā
Products in Excellent condition have seen minimal use and wear. Any imperfections are purely cosmetic and do not affect the intended performance of the product.Ā Ā
TECH SPECS
- Recycled ripstop nylon fabric features a durable water repellent (DWR) finish made without PFAS to help moisture bead up on the surface
- Waistbelt and sternum strap can be detached to save weight, bringing total pack weight down from 9.5 oz. to 7.7 oz.
- Hydration-compatible design includes a hose exit port and an internal sleeve with a hang loop for a reservoir (reservoir not included)
- Back panel is lightly padded; pad slips out for use as a sit pad
- Breathable mesh shoulder straps have fold-over padding that softens contact with your neck and shoulders
- Single-handed, quick-pull drawcord with small weather flap seals the top
- Zippered side pocket for easy access and added security
- Sunglass loop on left shoulder strap lets you hang your shades
- 2 interior slip pockets
- Exterior loops can be used to lash on extra gear, add compression or tie the Flash 18 to a larger pack
- For use in your larger backpack or duffel, this pack converts into a stuff sack simply by turning it inside out
- Tool loop with tuck-away pocket
- Product meets the bluesign criteria
- 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






















