It's hard to beat the wool-powered warmth of the Simms Ultra-Wool Core 1/4-Zip Fleece Jacket when you're headed out for a full day on the river. This wool-blended baselayer is soft against the skin and breathes naturally to keep you comfortably dry and warm in varying conditions when the weather can't get its act together. Furthering your dry comfort, the fabric also wicks sweat away from your skin and fights the buildup of funky odors after demanding hikes in and out of your favorite spot.