This set of two dumbbells supports strength training by helping build muscle mass while also benefiting cardiorespiratory fitness and flexibility. Each weight is wrapped in rubber, which makes it durable and less likely to damage floors, and the coating resists chipping even with regular use. Ergonomically curved handles are shaped to match the palm, and their textured non-slip surfaces provide a better grip, while the metal construction causes less sweat than softer handles for a more secure hold. The hexagonal shape keeps the dumbbells from rolling, so they stay where you put them, even when you are rummaging in storage. Each dumbbell weighs 15 lbs.