glove serve purpose . I use they surf -lrb- occasionally -rrb- & you do notice much more power in each stroke . they do fill with water which make the a little cumbersome & heavy increase fatigue . I would not recommend these for swim training -lrb- pool -rrb- , I have use plastic hand paddle & they work far better , but , as say these provide grip when out on the surf board & keep you hand slightly warmer .