I wore a Sealskinz Jacquard Waterproof Beanie for the southern portion of the Appalachian Trail in 2015 and throughout the winter in the Pacific Northwest.
- Sizing runs quite small. I have a pretty small head (22 in) and I needed the L/XL
- Heavier than most beanies I own
Overall I recommend this as a winter beanie to anyone in a cold, wet climate. It's a bit too heavy to be reasonable for 3 season thru-hiking use, but I could justify sending it to yourself in a box at colder/wetter sections of trail. Ie. Washington on a NoBo PCT trek, or to Virginia on a SoBo AT hike.