On Sale! Save 20%


Flowfold Large Optimist 18L Backpack

Was: $99.99
Now: $79.99
(You save )
(No reviews yet) Write a Review


The older sibling to Flowfold's best selling 10L mini backpack, the 18L Optimist is roomier, tougher, and ready for even more adventure! An infinitely practical backpack, with a sleek silhouette and exceptionally durable design, it's highly functional with minimal fuss. Made in USA and covered by the Flowfold Lifetime Warranty.


  • Capacity: 18L
  • Main Compartment: 18” H x 11” W x 5” D
  • Outer Pocket: 6.5" H x 11" W
  • Weight: 12 oz / 340 g
  • Zippers: YKK® zippers
  • Fabric: EcoPak™ Fabric from Challenge Outdoor*

Want more internal organization with the Large Optimist BackPack?  Grab the Voyager Pouch Set from Flowfold!

For a Limited Time, Buy this Flowfold product and receive a Free Essentialist Pouch with your order!

Made in USA (right here in Maine) with a Lifetime Warranty.

* See our Flowfold Category Page for a breakdown on the EcoPak™ fabrics used.


Warranty Information

From design to production, every Flowfold product is crafted to endure a lifetime of everyday use and extraordinary adventure. If your product does not measure up due to a manufacturing defect, we will work to resolve the issue by repairing it or replacing it. Our most common issues we repair through our warranty are rips or holes occurring at seams and zippers. That being said, exposure to the elements will wear down even the strongest mountain face. Damages not covered by our Warranty Policy include: Normal fading, wrinkles, and spots (you know, the general wear and tear that comes with living a life of adventure) Blemishes, rips, or holes caused by misuse of the product (our wallets are strong but they’re not puppy-chew-toy strong) Cosmetic damage (Sharpie marks, ink spills, a yogurt explosion that leaves your bag smelling...odd) Loss or theft Warranty Registration is done direct through the FlowFold website: https://www.flowfold.com/pages/activate Warranty claims are only issued to the original purchaser.

Related Products

Customers Also Viewed

Subscribe to our newsletter

Get the latest updates on new products and upcoming sales

No thanks

centered image

centered image