Introduction: Cheap Comfortable Waterproof Carry-on Size Backpack

About: Girl from a small town. Inlove with DIY. Electronics. Design. Coding

Hi, everyone,

this is my first Instructable and I want to share this backpack I recently made :)

I'm not professional and still have to learn a lot.

It took me around 2-3 months to complete but worked once a week. I think it could be completed in few weekends.

Total cost was ~30£

Step 1: Materials

  • Waterproof fabric ( ~ 2 x 1.5meters)
  • Fabric for lining ( ~ 1.8 x 1.5meters)
  • Fabric for padding ( ~1.5 x 1.5m)
  • Big zipper (0.85m)
  • Smaller zipper(0.48m)
  • Light flexible plastic for the back (0.05 x 0.3m) x 2 pieces (I used some kind of plastic that I found laying around)
  • Bias tape ( ~3 m)

Keep in mind that if you change the design or size you will require more/less of the fabric.


  • Scissors
  • Sewing machine
  • Fabric glue (optional)

Step 2: Design

Before I started sewing this backpack and sketched a bit (I'm not that good at it tho) and came up with few specifications.

  • Waterproof
  • Minimalist design
  • Have a pockets for pens
  • Have a pocket for 15.6 inc laptop
  • Could be opened almost fully
  • Comfortable
  • Have a back support

Step 3: Cutting&sewing

This part the trickiest and takes the most patience but practice makes it perfect. I started by cutting all the pieces than sewing padding to it. To the back I sew to pieces of plastic because I wanted to be hard before that covering with padding. After this comes time to add lining and then sewing all the pieces together. I did this in this order :

Sewing :

  • all the pieces individually
  • front pocket with the zipper to front piece
  • straps and to the back piece
  • side pockets to side pieces
  • zipper to side piece
  • side piece to back ( I recommend doing this first instead of front because it's harder to reach back)
  • back with front

I found sewing bias tape to raw edges inside of the backpack too complicated so instead I decided to use fabric glue to do the trick :)

Step 4: Finished Backpack

Bag Contest

Participated in the
Bag Contest