Tweed Touring Cap (flat cap to you and me) with Gore-Tex via LLBean.
100% Harris tweed. Gore-Tex lining. Will never need another one.
I can't do these... I put them on and my grandfather stares back, too eerie.
The Scottish tweed offerings from Orvis are a little brighter, and the Irish tweed caps are a positively cacophonous rainbow of wool...