Breathable and convenient for drinking water, for dogs Thank you for looking. I am selling this because it was too big when I tried it on. Used only once and washed. (It is the item on the left in the 5th photo. It is not a set of two.) My dog is a male German Shepherd 32 kg 10 cm from eyes to nose tip 30 cm around the mouth It was quite large, so I think it's suitable for extra-large dogs. I am also selling the muzzle guard on the right in the photo, so please take a look if you'd like.