ok . I figure with Michelle Obama bare arm , sleeveless dress be go to be the rage for the next four year at least . so , how can I make my swim more effective for tone my arm ? I do not know if these will do the trick , but they sure be great fun to use . I use they with Zoomer Fins for the first time today and I go really fast and get a much more powerful workout . a friend at the pool say , `` you be smile the whole time you be speed up and down the pool ! '' Heart rate get up higher , too . great product .