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Mountain Flyer DIY Ultralight Backpack Pattern – 40L

The 40L Mountain Flyer DIY Ultralight Backpack is a great place to start or continue your DIY ultralight backpack journey. The backpack is light-weight and simple to make. If made correctly it is extremely durable on the trail.

This build features the classic Mountain Flyer silhouette, shock cord compressible side pockets, y-top strap, hip belt, front and side lash points, front mesh pocket with buckle closure, padded back panel, and whatever else you want to add/remove for your personal needs.

You can have confidence in using the core pieces of this pattern while modifying pockets, lash points, etc. as you go. Have some fun, will ya?!

If you have any questions about the DIY Ultralight Backpack pattern, feel free to ask. I'm here to help you get started on your DIY journey on the trail.

What’s Included

1 Large Format Pattern
2 Printer Friendly Pattern
3 Materials List
4 Sequence of Construction


Video Course - $20

Making bags can seem complicated - I get that. That's why I created a video tutorial for the DIY Ultralight Backpack. I take the guess-work out by overviewing each phase of the build.