The Hyper Vest PRO weighted vest features a revolutionary control system and fabric described as the best weight vest by Men’s Health Magazine. The innovative design of the Hyper Vest PRO holds high-density steel weights firmly and comfortably close to the core, even during vigorous, multi-plane movement. The compression fabric hugs the chest in the horizontal plane, allowing full chest expansion and contraction for breathing while the weights stay in place. The resulting slim profile allows the user complete range of motion. Because weights are only ¼ inch thick, the PRO weighted vest is barely detectable under a shirt. A breathable, odor resistant, wicking fabric and generous open side panels make the vest exceptionally comfortable. Hyper Vest PRO vests are pre-loaded with 10lbs of weight, and additional booster packs of weight can be purchased to increase the load of the vest. Note maximum load capacity for Hyper Vest Pro: Small (23lbs), Medium (26lbs), Large (34lbs), XL (46lbs) XXL (65 lbs). Machine washable. One year warranty.