Germanium: 2.4%, Titanium: 0.25% * Length(4 sizes): Approximately 18""/45cm; 20""/50cm; 22""/55cm * Width: 1.2 cm * Material: silicone, negative ions, nylon, plastic * Benefits: 1. Reduces muscle tension and increase flexibility 2. Protects against muscular injury 3. Reduces fatigue thus enhancing the ability to perform at maximum level 4. Improves blood flow & circulation 5. Alleviates discomfort and improves sleep