The twin draft guard is basically a door snake like people have been using for years. But, this one has the added advantage of staying with the door when you open and close it. After using a traditional snake (which I also made myself) for one winter, I know how much of a pain it is to move every time you move the door.

This project can probably be completed in around a half hour. It's free as long as you have some scraps and basic sewing supplies lying around. See step one for more details.

Step 1: Gather Your Supplies

1. Scrap fabric - You'll need something about 12" by 35". You could patch pieces together if you don't have a big piece of scrap. This could really be any kind of fabric; I used some felt but you could even use some old clothes or something.
2. Something to stuff it with - Real stuffing is probably best. You could also use some type of foam, maybe some cotton balls, or some smaller scrap pieces.
3. Pins
4. Measuring Tape
5. Scissors
6. Needles for hand sewing
7. A sewing machine is also helpful, but you could just do it by hand if you'd like.
8. Something to push the stuffing down with. A pencil could work for this, I used a hard plastic drink stirrer that had knobby ends.

Step 2: Measure and Cut

1. Measure your door:

1a. Using the tape measure, find the depth of the door.
I found that if you have a carpet on one side of the door or if there is a ledge, you should probably add a little to this measurement, since it will be very tight. Mine was just under 1.5" (I should've added more to this measurement).

1b. Measure the width of the door.
This is how long your draft guard will be. Mine was about 30".

2. Calculate your fabric size:

2a. The width of the fabric will be:
8.5 + (depth) * 2
This will give end pieces that are about 1" tall. If you have a really big gap under the door, this will need to be bigger. With a 1.5" depth, my fabric width is 11".

2b. The length of the fabric is:
(door width) + 2.
This will give some extra for seam allowance and error. Mine is 32" long.

3. Cut the fabric:

3a. Lay the fabric on a flat surface. I used the floor.

3b. Measure where the length is on the fabric and try to cut in a straight line. Cut as far as the width you need.

3c. Cut a straight line all along the width of the fabric. You should have a rectangle with the dimensions that you calculated.

Step 3: Sew the Pockets

1. Stitch the main seam.
- Fold the fabric in half lengthwise ("hot dog style").
- Pin the edges so that they line up as much as possible.
- Stitch about 1/4" inch from the edge all of the way down.

2. Stitch along one short edge

3. Flip the whole thing right-side-out

4. Lay flat and measure 2" from one edge. Mark it with a pin. Stitch a pocket all of the way down, 2" from the edge.

5. Repeat 2" from the opposite edge.

Step 4: Stuff the Pockets

Stuff each of the outer pockets with stuffing (or whatever you're using). A few tips:

I found that it would've been easier to stuff both sides at the same time. I did one at a time and it would've been easier if I could scrunch the excess down to stuff it in all of the way, but one side being stuffed already made it pretty stiff.

Your finger can only reach so far, so you'll need something to shove the stuffing all the way to the bottom with. I used a drink stirrer (not disposable) that had knobby ends. A pencil or something similar would work too. You'll have to put a bunch in and then shove it all the way down with the stick.

Step 5: Close the Ends

You should probably double-check the length of your draft guard now. Slide it under the door and check if it's too long.

1. Thread a needle.
I used the thread so that it's doubled and both ends get tied together - I wanted the extra strength.
2. Make big stitches all of the way around (see image).
3. Start pulling on the thread once you get around. The end should bunch up.
4. Poke the end into the hole that is created.
5. Pull tight all the way and tie the ends of the thread so that it stays put.
6. Repeat on the other pocket.
7. Fold the end of the middle piece under and stitch it to create a finished edge.