Yes, they can see through it, but the ThunderCap® does filter the dog’s vision in order to reduce the visual stimulation that the pet experiences which helps them in stressful situations. See-through fabric that reduces visual stimulation while allowing the dog to maneuver through his surroundings. Soft fabric and elastic fit for maximum comfort. Great for vet visits, grooming, car rides, walks and other times when your dog might be reactive to his environment. Works great in combination with ThunderShirt® in some cases.