Men's Workout Shirts: Unique square mesh jersey, lightweight and ultra soft. Elastic with good ventilation, providing you superior comfort without load feeling. Moisture wicking shirts for men: quick dry fabric keeps you cool and dry in exercise. Ergonomic 4 needle flat-lock seams allow greater range of motion. Tagless design to reduce chafing in movements. Athletic loose fit: Please check last picture to select the appropriate size. Reference: Our model (5'11 ft./ 182 lbs.Chest 42.5"- Waist 31.5"-Hip 37.5") wears size L. Great performance shirts for sports: running, jogging, power walking, cycling, hiking, gym training or yoga fitness, etc. For dark colorways, strongly suggest washing before wearing. Machine wash gently in cold water, separately or with like colors only. Please kindly understand,colors may look differently on individual monitor of different settings.