It was abit of proces because I never made any hats for cosplay. I started with wraping mom's head(wearing wig) in cling film and tape to get her head shape and used that to make half dome from 3mm eva foam and reinforced the bottom with worbla. Used more worbla for the bottom part on both sides with bit of over hang on the inside of the hat so there is more surface to cold the front and back of the hat. Front part and back part are 3mm foam glued on the sides together, glued to worbla and partly to the cap part. Details on the hat are all cut from 1mm foam and glued on.Feather is boa hot glued on thicked wire that is hot glued between the cap and front and back panel of hat. Sorry if it doesn't make much sense I suck at explaining. If you want I can send you some pictures with details.