GearX Men's Summer Sports Sleeveless Round Neck Comfortable Baselayer Size: Please check the Fit section right under Price. You can also check Size Info on the Product Description below. Material : 91% Funtional Nylon / 9% Polyurethane / Outstanding elasticity Function: Moisture Sensor Fabric Ice Made / Available fast absorption and quick dry, Keep heat/cold, UV Block, Antibacterial Uses: Perfect Sports Functional Base Layer suitable for various sport activities such as jogging, running , golf, tracking etc. / For active lifestyle, superb elasticity for excellent mobility / Suitable for summer season This item is stretchable and adapts to the body shape for comfortable wearing. Size chart is available on images. / The color displayed may vary depending on your screen.