Increase the intensity of your training with the Rival FistWork Gauntlet Weights. These fully adjustable weight straps allow you to add up to 0.6kg (20oz) to each glove. Easily attaches to any pair of boxing gloves with Velcro fasteners. They are ideal for training and developing functional muscle mass. You'll immediately notice increased speed and power, and you can quickly transform any pair of gloves into heavy duty sack gloves.