The Gooby apparel padded Vest provides the most warmth. Its thick padded layers provides insulation, water resistance, and wind protection. Made with 100% Nylon, the outer layer is strong and durable. The inner fleece on the inside adds extra comfort and is made with 100% polyester to retain heat and warmth. Made with functionality in mind, the step in design makes it easy to put on and take off while the built-in leash attachment let you go on quick walks without the need to put on an extra harness.