Comfortable Ladies Helmet

I came across the pattern for this soft ladies helmet/balaclava on the V&A knitting website. They've got loads of brilliant old war time knitting patterns and I plan to make quite a few of them. 
http://www.vam.ac.uk/images/image/12972-popup.html  


It was really easy to knit and well explained. I used a different yarn to what was suggested however, and so I don't think the tension was quite right (it should probably sit a little tighter on my head). But I don't think it matters really. 

To fasten the chin strap I used an old brown button from my mum's old faithful button tin.