Great vest at a great price. 20lbs is perfect for adding some strain to your walks/hikes to build endurance without it getting uncomfortably heavy. The vest forms to your body well, so you don't get a lot of "bounce" as you walk. It positions the weight up high on your chest and the strap secures it well (some others I've had in the past had the weight more over your mid-section and the straps rode up as you walked, allowing the weights to swing out and back with your stride, slapping you in the gut over and over). One review stated the weights don't stay in the pockets well because the pockets are too short - that person is loading the vest incorrectly - there is a 2/3-length bottom pocket the weights go into,then a 1/3-length top section that then pulls over the top of the weight, so the weights are 100% secure. They will not fall out when you are putting the vest on or taking it off. Top quality and comfortable design.