Step 1: Things Needed

1. Paracord
2. Sleeping bag
3. Knowledge
Ok so I'm not using actual paracord but who cares it works
This instructable is helpful for the people who don't want to spend 20$ on a compression sack and have it break

Step 2: Making the Top

Ok you should have about 12 18"-20" strands of cord take four of them and lay them like this

Step 3: Time to Tie the Knot

Ok you then want to tie some overhand knots to tie all four pieces together like this

Step 4: More Knots

Tie figure eights roughly 4 1/2 inches from the knots you just tied on all eight strands

Step 5: Cross Section

Grab two more strands of cord and lay them like this

Step 6: More Knots

Attach the two pieces of cord like this don't worry if you don't get it right it took me a few try's then go ahead and cut the tags

Step 7: The Bottem

Set what you just finished aside and grab six more strands and repeat steps 2-3 and 6

Step 8: Loop Time

Alright almost done now just tie some loop knots like bowlines at the ends of your tags make sure they are about the same length

Step 9: Putting It Together

Ok roll up your sleeping bag nice and tight like the picture and set it on top of the bottom piece

Step 10: Putting It All Together

Place the top on top

Step 11: Use Your Muscles

Push down so that you can fit the figure eights through the bowlines like this

Step 12: All Done

Ok so mine wasn't as tight as I wanted it so I adjusted some knots and you can see the difference works really well if you are trying to fit a full size sleeping bag in a backpacking pack