HIT Fitness weight vests are built with premium material that is extremely durable and long lasting. ... The vest itself consists of small pockets in which the weights are placed and straps which secure the vest to the user during workouts. HIT Fitness weight vests are available in weights 10kg and 20kg. Weight vests are predominantly used to add additional resistance to bodyweight movements such as pull ups, lunges, squats, and push-ups. A weight vest can also be used to increase the intensity and add resistance to cardiovascular focused training workouts such as cycling, running, and brisk walking. Research has also repeatedly demonstrated that wearing a weight vest during speed training exercises can drastically increase speed, strength, power and overall hypertrophy due to the additional load that is being placed on the body while performing these speed drills.