RuffWear Headwater Collar & Lead Set. I've only used it once, but the size was too big, so I made two holes. (See the red circles in the 10th image) I think it should be fine to wear, but please refrain from purchasing if you are concerned. Although it is in a clean condition, please understand that it has been stored at home for a long time before purchasing. I try to inspect it carefully, but I am a novice, so please forgive any minor oversights. Returns are not accepted, so please ask any questions before purchasing. I usually ship within 1-2 days, but I may go on a sudden business trip, so if you are in a hurry, please inquire in the comment section before purchasing. I review the price from time to time. I am selling it at a low price including shipping, so I will not be able to offer a significant discount. (If you purchase multiple items together, please consult in the comment section) #MediumDog #LargeDog #WaterPlay #SnowPlay #GoldenRetriever #Shepherd