Great hat. Agree with others who say the sizing is tricky. I wear an XL hat in most OR applications. An XL in this hat fits perfectly with the liner folded inside, but the hat is ALMOST too large when the liner is pulled down over your ears. Have to cinch the velcro strap way up beyond where it's probably designed to go. Might buy a large if I had it to do over, but my head might just be between sizes. Otherwise, super quality as usual from OR; my go-to winter hiking headwear. Great to have the option of warmth over ears and lower head without bringing a second hat as a liner. And drop-dead waterproof, as expected. Very wide brim.