ELEVATE YOUR WORKOUTS WITH THE NIKE WRIST WEIGHTS.Featuring an anatomical design for increased comfort, these wrist weight won't shift while you workout. Hook and loop closure help's ensure this. A moisture wicking lining will help keep you cool when you start to heat up.FEATURES Anatomical design Moisture wicking lining Hook and loop closureTECH SPECS Construction: 91% Iron, 7% Thermoplastic Rubber, 2% Polyester