Reflective Dog Vest. Night walks just got safer with this vest! The bright orange color and reflective stripes on this vest keep dogs visible during night walks or low-light conditions. An added bonus? This vest can cool your pup off too! There are long-lasting cooling polymer crystals sewn into the vest which absorb water and slowly evaporate to keep Bowser cool for hours. To activate cooling soak vest in water for 3-5 minutes before use and squeeze out excess water. Sizing: <b>S</b>: Girth: 16-24 in. <b>M</b>: Girth: 23-32 in. <b>L</b>: Girth: 30-40 in.