The Chuckit Zipflight Max Glow is made with a safe, high-quality photoluminescent material that is both chemically and biologically inert. Recharge in seconds with a bright flashlight. Fast charging Max Glow rubber, EVA foam, and 2100 denier polyester construction. Glow in the dark 3D print on fabric, and glow in the dark rubber ring on the bottom helps you and your dog find the flyer no matter what side it lands on.