These were a gift. Very fun, well made, and loud. Mex brand Size medium See photos for details. Open to offers Sold out on Amazon!! High quality. Super elastic and super thermoactive. Up to 23 percent elastane and 77 percent polyester Perfect density: 270 g/m². Special thermoregulation and moisture ventilation systems. Optimum body temperature maintenance system. Registered MEX-COOL Sport technology MEX ANTI-TOX antibacterial coating with ions of silver.