The often underappreciated yet extremely versatile and powerful classic sandbag is a multipurpose functional strength training tool with numerous benefits that are not possible to realize through traditional barbell training alone. The ZIVA ZVO Premium Power Core Bag elevates this classic multipurpose functional training tool to elite heights with a rugged synthetic leather outer coating reinforced with thick composite skin; premium quality, high strength stitching and embroidery; and heavy-duty nylon straps and ergonomic handles. This highly flexible functional fitness tool, available in 10 lb. increments from 10 lb. to 50 lb., includes air hole end caps for added safety and silencing and allows for a variety of compound and combined compound lifts favored in the elite training community.