The O'live weighted vest is strong, durable and has a fully adjustable strap to ensure a precise fit to the torso. The vest incorporates weights, which are secured neatly in their own pocket by Velcro, the 10kg vest incorporates 6 pockets on the front and 6 on the back while the 20kg vest incorporates 8 pockets on the front and 8 on the back to ensure an even distribution. It allows you to add or remove weights quickly and easily according to your needs.