"Lock in and power on" "The hard hitter" The Powerlock Pro Hook & Loop Training Gloves bring the perfect balance of speed, comfort and protection while delivering a powerful punch. An Ideal boxing glove for heavy bag workouts, mitt work and sparring. Powerlock technology provides an ergonomic layered-foam construction that secures the hand into a natural fist position, keeping your knuckles and wrists safe. The premium synthetic leather construction ensures long-lasting durability and superior performance as you take on your hardest opponents.