KONG Twistz High-Viz Rings vibrant, highly visible colours make this the perfect toy for all outdoor environments, weather, and terrain. This twisted ring is easy-to-grip, with bright colours that stand out in tall grass, at the pool, in snow, on dreary dayseven at night with glow-in-the-dark technology. Durable material gives the Twistz High-Viz Ring a dynamic bounce and long-distance rolling action. Charge the Ring under a lamp or in the sun for 15-20 minutes to activate glow-in-the-dark feature. Clean with Damp cloth. This toy should be regularly inspected to ensure there is no damage. If any damage is seen the toy should then be discarded.