The Citadel by RIVERS WEST uses a separate, soft, next-to-the-body fabric embedded with the Aegis Microbe Shield® to help ensure no outside contaminates come in contact with the pet while a separate waterproof exterior fabric shields against the rain. Aegis® has been a leader in the antimicrobial field for over 30 years. Aegis® is EPA registered. The Aegis Microbe Shield® is an antimicrobial fabric which helps prevent odor-producing bacteria and reduce the risk of skin infections caused by fungus. Safe and effective on and around all pets – does not rub off/wash off or migrate to skin. Aegis® creates a powerful barrier against the spread of antibiotic resistant bacteria. The 3M retroreflective material across both sides of the vest is recognized as the most advanced reflective technology in the world today. It is permanently welded to our fabric and enhances the visibility of the dog in night-time or low light conditions when illuminated by a light source. Comes with a D-ring on back at neck. Washer and Dryer safe.