2XU Men's Elite Long Sleeve Compression Top 80% Nylon/20% Elastane Imported Powerful PWX weight panels target the upper body and core for better posture and technique Graduated compression in the arms increases circulation for faster warm ups and recovery Invista LYCRA fabric adds stretch for a comfortable, supportive fit Flat lock seams reduce chafing and irritation Moisture-wicking and antibacterial properties keep sweat and odors in check with 50 UV fabric provides extra protection against the sun's rays