I got this for my extra lens I have in my bag that I am always worried about breaking or scratching up. This little bag was a life savior on it. Now the ad is a bit confusing at first. know that your only getting one cover not all the different sizes shown. Two measure your lens with both caps on before choosing. I like that they are padded and a quick button for opening and closing so you can move fast with your camera. I am going to buy a few more for my smaller lens but I got the largest size for my long lens.