Tone your muscles in style with the Nike Resistance Loop. Crafted with knit fabric, this band feels soft and comfortable. It has durable construction for long-lasting wear and features silicone on the interior grips to keep the band in place. Make your workouts more challenging with the Nike Resistance Loop. Weight: S: <120 LB; M: 125-170 LB; L: 175-205 LB. 51% rubber/35% acrylic/14% polyester. *Choose the right size according to your body weight.