Adjustable: Adjustable hook and loop type fastener straps - adjust the tightness according to your preference! Comfortable: High quality breathable and soft fabric that's comfortable for all day wear and will not cause any irritation to your skin. Size options: Choose from 3 sizes - medium (53-83cm waist), large (60-97cm waist) or extra large (99-112cm waist). Back support: Grab yourself a self heating magnetic back support. Supportive: Effectively promotes blood circulation and aims to relieve the pain associated with joint and back problems. Self Heating Magnetic Back Support | Living Social | Living Social