Material: Latex Size: Approx. 500 * 50mm / 19.7 * 2.0inch Optional Thickness: Approx. 0.35mm/ 0.5mm/ 0.7mm/ 0.9mm/ 1.1mm Pound: 5-10LB/10-15LB/15-20LB/25-30LB/35-40LB Function: Keep Slim, Tighten Abdominal Prefect for dancing, yoga, body building, fitness, sports, outdoor activities etc. Easy to Use & Carry: The resistant band is portable and come with a backpack for you to carry it anywhere, be it to your home, gym or even as you travel therefor you can continue with your work out routine anywhere you go.