When you layer up to head outdoors, protect your best friend as well with the K-9 Overcoat, Ruffwear's most durable dog coat. Designed to be warm and durable, this coat is wind- and water-resistant. The recycled fleece insulating layer is enclosed in a durable recycled polyester shell, keeping body heat in and the elements out. Tailored fit offers extra neck, chest, and belly coverage. Elastic stay-fit webbing and Duraflex auto-lock buckles adjust for a custom fit and provide easy on/off. A 3M reflective trim offers enhanced visibility. To determine correct size, measure your dog's girth (the widest part of the rib cage).