These armbands are so much simpler to put on than pull on armbands. They simply clip together under the arm - no more fighting, and far less stressful for your baby. They can also be used in a variety of different ways - even clipping them front and back around the lungs, as a simple body float. Clipped shut,and hand held, one in each hand, they make superb hand held floats, and opened out, and held at each end, they make a less buoyant, moving on, hand held float as confidence and ability progresses.
I was a specialist babyswim teacher for many years, and these armbands are far and away the best armbands I have ever used in my classes. Very adjustable you can use them from very tiny to a much older pre-schooler