Rubber Washable Perfect for rehab, prehab and activation drills. Four levels of resistance available Micro Bands are essentially power bands that are smaller in diameter and thickness and best-suited to rehabilitation and prehab work, along with activation drills. They are essential to an appropriate mobility kit, and available in four different resistance levels that accommodate a wide range of athletes and needs. This listing is for a red, medium resistance band. There are five different resistance levels that accommodate a wide range of athletes and needs: Yellow: Extra Light resistance: 250mm x 50mm x 0.85mm thick Blue: Light resistance: 250mm x 50mm x 0.85mm thick. Red: Medium resistance: 250mm x 50mm x 1.0mm thick. Green: Heavy resistance: 250mm x 50mm x 1.15mm thick. Black: Extra heavy resistance: 250mm x 50mm x 1.4mm thick If you're chasing a set of five, you can purchase them here at 20% off. "