2 imagesSierra Designs Flex Summit Sack-Blue Jewel
Sierra Designs Flex Summit Sack-Blue Jewel
Sierra Designs Flex Summit Sack-Blue Jewel
Sierra Designs Flex Summit Sack-Caribbean

Product Discontinued by Manufacturer

Sierra Designs Flex Summit Sack has been discontinued by Sierra Designs and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Camp & Hike, Backpacks & Bags, Summit Packs yourself to try and find the perfect replacement for you!

Product Info for Sierra Designs Flex Summit Sack

The versatile Flex Summit Sack is the perfect lightweight, go-anywhere pack for travel, day hikes, and quick summit treks. Its unique "flexible" volume quickly and easily expands from 18-23L providing the perfect size all the time.image

Features of Sierra Designs Flex Summit Sack

  • Expandable 18-23L volume
  • U-shaped top access zipper
  • Zippered stash pocket on lid
  • Stretch Mesh Side Pockets
  • Adjustable/removable webbing waistbelt
  • Hydration sleeve and port
  • Breathable airmesh back panel
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Questions & Answers for Sierra Designs Flex Summit Sack
Q Is the 10" width of the pack when it's closed? How wide is the pack when expanded?
A
Expert Answer

When the pack is expanded, the width expands to about 12 inches.

Answered by Jonathan, Gear Expert, August 18, 2018
Q What is the width of this pack when it's expanded? Collapsed?
A
Expert Answer

The dimensions of the pack are (L x W x D): 18" x 10" x 8"

Answered by Jonathan, Gear Expert, August 3, 2018

Sierra Designs Flex Summit Sack Unavailable & Discontinued Models

List of Unorderable Models

  • Sierra Designs Flex Summit Sack-Blue Jewel , MPN: 80710316BJE , UPC: 054003791557 , Code: Z58-SPK-SID0497-363726
  • Sierra Designs Flex Summit Sack-Caribbean , MPN: 80710316CRB , UPC: 054003791564 , Code: Z58-SPK-SID0497-364417
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Last updated 2026-09-29 UTC.