You'll need a lined, hooded jacket pattern and the fabric and notions to make it. One of my favourite hooded jacket patterns is Kwik Sew 2994. Don't be put off by it's ugly cover. It's a great pattern! You will also need some felt for the spikes. I really like Heather Bailey's felt. It's not 100% wool, but it still has a lovely feel to it. I used two shades of green to make my spikes.
Right. Lets get sewing... To start with, make up the outside of the jacket up exactly as the pattern says.
Next we'll need to make up the lining with a few simple alterations...
Start by cutting the hood, sleeves and front pieces exactly as directed by the pattern. Then...
1.Don't cut your back jacket piece on the fold. You want to end up with two back pieces so that you can insert the spikes into the centre back seam. Add a seam allowance (the same as the rest if the patten) to the centre back seam.
2. See? You have two back pieces with an a seam allowance added to the back seam.
3. Draft a spike pattern. It's a bit hard to be specific here because they need to be in proportion to the the size of the jacket. As a general guide, I made a size 2 jacket and the length of the base of my spike was 6cm and the height from the base to the apex was 6cm. When deciding on the size of your spikes, remember that you'll lose about 1cm off the bottom of your triangle as the spikes are inserted into the centre back seam.
4. Cut out your spikes. How many? Again, it depends on the size of your jacket and the spikes. I made four to go down the back and four to go on the hood. You need to cut two pieces of felt for each spike. A single layer of felt makes them too floppy. I made mine two tone, but it's up to you. So, for 8 spikes, I cut 16 triangles.
5. Pin the triangles wrong sides together (I know, felt doesn't really have a right and wrong side, but just remember that you aren't going to turn the spikes through. ) and sew with a narrow seam allowance.
6. This is what your spikes should look like now...
7.Evenly space the spikes down on the right side of the centre back seam of one of the back pieces with the points of the triangle facing inwards. Leave a gap of about 5cm at the top and bottom. This is so that the spikes don't get caught up with the hood or the bottom of the jacket.
8. Lay the other back piece over the top of the piece with the spikes on it, right sides together. Pin and seam. You'll sew through the two back pieces and the spikes.
9. See? you have made a spiky jacket lining!
Insert the pieces in the hood in exactly the same way. You don't have to add a seam allowance to the centre back of the hood as there should already be one included in the original pattern piece.
My work here is done. Make up the jacket now according to the pattern's instructions. Enjoy!