Strap for Mi Band 2. Features: The band holds the sensor tightly in place and sits snugly on your wrist, even throughout the most vigorous exercises. The band has Hypoallergic properties, so it is smooth to touch and comfortable even for people with sensitive skin. Material: Thermoplastic elastomer. Adjustable length: 155 – 210 mm. Total length: 235 mm. Colour: Green.