On Christmas Day, the Duchess of Cambridge stepped out to church in a black alpaca fur hat from Peruvian Connection. It’s not her first hat in this same style- in January 2017, Kate wore a similar style (with flatter crown) in grey from Lacorine. Both hats have wide, cuffed brims and cover far more of her head than the other hats in Kate’s wardrobe- understandable for winter hats but still a style departure.
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Update: Kate added a third version of this hat in warm brown (another “Sumac” design from Lacorine) on January 7, 2018
Thoughts about this pair of fuzzy hats?
Photo from Getty as indicated
Royal Hats 
I like both hats. I really like it when a royal wears a hat that is strictly for a season. These hats look warm and comfortable!
I prefer the gray too….I notice her face first, then the hat, not the other way around as is the case with the black hat.
It seems that not just the crown, but the brim of the gray hat is narrower too. I find the gray hat less overwhelming with her features. Plus the plain coat is not competing with the hat.