I always go for this make, they rarely leak. One pair for the sea and one for the pool. These are replacing the ones that got swept off my head by a huge wave as I was getting out !
I bought these for my adult son who has severe learning difficulties. These armbands are very good quality and decent size. I'm sure they will last longer than some of the cheaper ones. Well worth the money and I would recommend them.
I ordered two of these for my sons swimming kit bags. Found them to be very competitively priced and they arrived very quickly. No issues and perfect for training.