The Nike Men's Core Compression Short Sleeve Top is made of sweat-wicking four way stretch fabric to provide comfort and support throughout your workout. The Dri-FIT jersey fabric is designed to offer the ultimate moisture management, which helps you stay dry and comfortable. Dri-FIT mesh underarm gussets provides breathability and a greater range of motion, plus strategically placed flat seams minimise any irritation that could be caused by chafing. A waist panel cuts down on bulk so it's easy to layer and the ribbed crew neck ensures a nonrestrictive fit. - A.D. Core Compression Short Sleeve Top Provides comfort and support during your workout Dri-Fit jersey fabric wicks sweat away Mesh underarm gussets for breathability Strategically placed flat seams to minimise irritation Waist panel to cut down on bulk