The Core Sweater keeps your dog cozy where it counts without restricting his movement or slowing him down. Constructed with 10 oz. knit fleece—slightly heavier than the normal weight—it’s perfect as a standalone in cool weather, or as a layer when the weather starts to get a little mean. Throw in the zippered opening to accommodate a harness, and adjustments at the neck and chest, and you’re looking at one of our most versatile, essential sweaters, perfect for every dog, landlubbing and seafaring alike.