From Merchant & Mills:
This is a PDF pattern that will give you the relevant pattern pieces to make a hood for the TN31 Parka. There are two options, you can either make a hood that is detachable with buttons or a hood that gets sewn in. This includes the pattern pieces and instructions for both options.
NOTE: Please note you have to already have the TN31 Parka pattern in order to make this, these are just the additional pattern pieces with instructions for those parts.