Gentle Leader Calming Cap - Helps to Calm Anxious Dogs, (Petit) The Calming Cap is not a blindfold! The Calming Cap is a soft fabric mask that filters a dogs vision to reduces the visual stimulus that is making him/her agitated. Single-panel sheer fabric window offers enough vision to confidently navigate surroundings while reducing the visual stimulus. Soft fabric and elastic fit provides maximum comfort. Two Velcro strips wrap around the collar allow for easy on/off. Cute dog print fabric in light blue.