Compression arm sleeve - ·70% nylon, 30% elastane ·Quick-drying and breathable ·Thin and light to maximize heat emission ·Compression 15-20 mmHg ·Improves circulation, reduces lactic acid build-up and muscle fatigue during exercise and running ·High-density construction prevents muscle stiffening, spasms and micro-injuries ·360˚ seamless knit, adapts to the figure ·Comfortable to wear even under normal clothes ·Easy to put on and take off ·Product sold in pairs ·CLOSE-OUT: This product is withdrawn from the Falk&Ross collection (still available from the manufacturer).