ATTENTION - The elastic of this vest should be at the waist. Please look carefully at the direction of wear on the pictures IRON PELLETS & METAL ROCK - Henkelion weighted vest is filled with premium iron pellets and metal rock rather than using cheap river sand ERGONOMIC DESIGN & BALANCED WEIGHT - This weight vest is distributed weight throughout your body, including an adjustable strap to prevent slipping and sliding during exercise (WEIGHT NOT ADJUSTABLE) COMFORT MATERIAL & CONVENIENT POCKET - Our weighted body vests is made of soft neoprene material and mesh pocket on the back to save room to add extra weight EQUAL WEIGHT DISTRUBUTION - With pockets located at the front and back of the vest, the weight vest gives you maximum comfort during all workouts without straining your back or shoulders.