DIY Thermal Hair Care Heat Cap

Elina Crafts, Sewing

Self-care is important and I always have a good hair day after a hair mask. I usually just experiment with ingredients I have on hand, like an egg-yogurt mask. A thermal cap is a very handy thing because it delivers heat, it opens the cuticles of your hair and makes your hair absorb the hair mask better. So it’s a very handy thing to have and it’s not so expensive so you can buy it if you want to. But they are all microwavable and I don’t have a microwave. But I do have an oven and I wanted something that I could take out and heat up and place back in the cap. So I needed to figure out how to make one for myself with an ‘opening’. I decided to make one with a zipper. But I’m hopeless with stalling them so if you are looking for a zipper installment tutorial you should definitely check it on YouTube. I’ll show you what I did but really you should see it done by a professional.

supplies for diy heat cap

My favorite stage gathere your supplies and these are:

  1. Two  types of fabric: cute patterned fabric for the top of your cap and a very soft and heat holding fabric like terry cloth or fleece
  2. A sewing machine and typical sewing supplies like scissors, thread in the same color of your top fabric because it will be visible on the outside, I took white. You’ll also need some sort of measuring tape to measure your head and textile marker that you can wash off or a chalk pen. Oh and don’t forget the sewing pins they will save your life at some point.
  3. You’ll need rice, cherry pits, or flax seeds
  4. You’ll also need a zipper if you don’t have a microwave like me and want to heat up whatever you want to use as filling of your heat cap
  5. And finally you’ll need an elastic band, first I wanted to use a broad one but later decided to go with a classic thin one you’ll see what I mean later in this post
Measure a square from your two fabrics. Mine is 50 cm by 50 cm (double of my 25 cm) then fold your square into another square. So now my square is 25 cm

The first thing that you need to do is measure your head from somewhere in the middle of your forehead to the back of your head somewhere where your hairline ends. So take your measuring tape and measure your head from your forehead to the end of your hairline mine was 40 cm. So then take that and divide by 2: mine is 20 cm. But this measurement will give a very fitting cap and we want it loose so take that and add 5 cm: so mine was 25 cm. This is your final measurement. Initially, I only added 2 cm and it was not enough so please add 5 cm to be sure yours will not be too tight.

Fold your square in half and measure your final measurement at the longest side so I measured 25 cm.

So now take a marker and connect your two sides but not straight but a curved line. So this will be a more difficult method but this way you can control how big your cap will be.

The easier method is this one: find a big enough circular object and trace it. You can take a salad bowl or another big circle shaped kitchenware or not a kitchen whare and trace the circle it has to be bigger than your head. But before you cut, if you want to install a zipper you need to do this step first scroll down to see how I did it.

This is a very quick method to get your perfect circle
Do the same for you lining fabric.

Do the same for the fabric that would be on the inside of the heat cap.

This is an extra step for those who want a zipper (!) before (!) you cut your fabric

For installing a zipper I would advise you to take a look at this tutorial:

It’s from Toni Barsi and she explains it very very simple.

Install the zipper first on your cover fabric and then cut out the circle this will make the sewing two half together much easier.

Always pin your zipper.

Open it and sew one side until you come to the zipper head. the close it and stitch it till the end. Repeat on the other side.

This is how it looks when one side is sewn.
Leave the zipper half-open before you start sewing the two halves of the fabric together.

So once you have installed the zipper you can sew the two halves of your fabric together. Do leave the zipper half open so you can turn your cap the right side out when it’s all sewn. Before you start sewing you have to place your top fabric and your lining fabric right sides in and ‘wrong’ out.

It should look like this and then pin everything in place.

Once you have pinned your two fabrics you can start sewing them. I took one cm from the edge as my seam allowance.

Well, actually I eyeballed it but take one cm for safe measure.

Don’t connect your seam leave a fingers worth of an opening on both sides you can install your elastic afterward. Backstitch it at the beginning and the end for reinforcement.

This was my dilemma I didn’t know whether I wanted a simple elastic band or a fancy broad one. it’s all up to you really, mine broad one was too stiff so I went with a classic thin one.
As an option, you can also zigzag your edges to stop them from fraying, but you can also skip this step. Also, don’t forget to leave the opening for the elastic band free because otherwise, you’ll have difficulty later.

Ones all of this is done you can turn your cap right side out from the opening of your zipper. If you didn’t install a zipper you can still turn in right side out because of the opening you left for the elastic band.

I’m showing you where I left a hole to put the elastic in.

So here you can see the opening I left for the elastic off course if you didn’t want to install a zipper your opening should be bigger than mine to make your turning it out easier. And also if you didn’t need the zipper now is the time to fill your cap with the filling of your chose before you stitch everything shut. Once that is done stitch another seam all around, one centimeter from the edge. This seam should be closed, this is where the elastic band is going to be. If you already filled your cap do this very carefully.

Installing the elastic.

To easily install the elastic take a safety pin and put it through the elastic. Then put the safety pin through the opening that you left for it.

Continue to pull the elastic through the opening.
Tie a knot

If you like me chose a very simple elastic tie it in a knot and that’s it if you did chose the broad elastic you need to stitch the ends to each other. You can do it by hand or on your sewing machine.

Close the opening by sewing it shut on your sewing machine.
Fill your cap with heated cherry pits, rice or flax seeds.

Once you’ve done this you amazing heat cap is done! Enjoy it! It will make your hair mask day feel like a spa treatment. It will also promote healthy blood flow to your scalp which will make your hair strand even healthier.

heat cap
This is ho mine looks and it’s very handy that I can just take out the cherry pits whenever I need to heat them.

Oh, and by the way, this thermal cap for your hair care can also double as a heat cushion for relieving the pesky menstrual cramps. It’s perfectly circular so it can cover your belly.

Enjoy this DIY and let me know how it went in the comments!