Gray: 45% Nylon, 43%Polyester and 12% Lycra, Black: 88%Polyester and 12% LycranTwo side pockets can hold 4u0026#34;, 4.7u0026#34;, 5u0026#34;, 5.5u0026#34;, 6u0026#34; Mobile Phone, Back zipper pocket for security storagenSweat-wicking, stretchy and comfortablen3u0026#34; inseamnMachine washablen