Full-Zip Design: Effortless Wear and Zero Shift for Dynamic Workouts. Put on this weighted vest like your daily jacket with one-step full-zip closure-no hassle with pull-over styles. The zip structure forms a snug supportive ring around your core, eliminating shifting or bouncing during running, jumping, or Hiit. 2-16 lbs Adjustable Weight: Detachable Sandbags and Balanced Distribution. This vest comes with 8 detachable sandbags (4 front + 4 back pockets) for precise 2-16 lbs weight adjustment. Scientific front-back weight distribution cancels rotational momentum. Customized Fit for All Body Types and Comfort. Dual-dimensional adjustment (adjustable shoulder straps + strong waist Velcro) lets you fine-tune the vest to your body shape. Wider padded shoulder straps reduce pressure points. 1680D Durability and Safety/Convenience Details. Crafted from heavy-duty 1680D armor fabric-resists scuffs, tears, and dirt. 360degree(s) reflective strips for night safety, dual belly pockets for phone and essentials. Multi-Scene Versatility and Easy Machine Washable. For walking, running, rucking, hiking, Hiit, home gym training. Fully machine washable-remove sandbags and wash. Weight: 17.67 pounds.